Here is some spring inspiration for the urban gardener. There are lots of videos and links here to drill down into.
Tag Archives: green infrastructure
March 2015 in Review
Better late than never – here’s my month in review post.
Negative stories:
- The drought in California and the U.S. Southwest is the worst ever, including one that wiped out an earlier civilization in the same spot. At least it is being taken seriously and some policies are being put in place. Meanwhile Sao Paulo, Brazil is emerging as a cautionary tale of what happens when the political and professional leadership in a major urban area fail to take drought seriously. Some people are predicting that water shortages could spark serious social unrest in developing countries.
- More evidence is emerging that published science skeptical of the mainstream climate consensus may have been influenced by fossil fuel industry propaganda, reminiscent of tobacco industry propaganda of the past. (By the way, tobacco industry propaganda is not a thing of the past – the industry is still up to its old tricks in developing countries that don’t stop it.)
- El Nino has returned. Some are suggesting this is one mechanism whereby heat that has been absorbed by the ocean in recent decades could be re-released to the atmosphere. I don’t know enough to say whether this is a mainstream opinion or not.
- Homework appears to be useless.
- A Wall Street Journal op-ed predicts the imminent collapse of the Chinese government.
- Farm animals, particularly pigs, are being given huge doses of antibiotics in developing countries. Beyond the risk of antibiotic resistance, it is a sign of the increasing intensification and industrialization of agriculture that is necessary as demand continues to rise.
Positive stories:
- The concept of critical natural capital bridges the gap between strong and weak sustainability.
- If we want to design ecosystems or just do some wildlife-friendly gardening, there is plenty of information on plants, butterflies, and pollinators out there. There is also an emerging literature on spatial habitat fragmentation and how it can be purposely designed and controlled for maximum benefit.
- Innovation in synthetic drugs is quickly outpacing the ability of regulatory agencies to adapt. (I struggled whether to put this in the negative or positive column. Drugs certainly cause suffering and social problems. But that is true of legal tobacco and alcohol, and prescription drugs, as well as illegal drugs. The policy frameworks countries have used to deal with illegal drugs in the past half century or so, most conspicuously the U.S. “war” on drugs, have led to more harm than good, and it is a good thing that governments are starting to acknowledge this and consider new policies for the changing times.)
- Deutsche Bank has joined the chorus predicting the coming dominance of solar power over fossil fuels.
- There are more Uber cars than traditional taxis operating in New York City.
- Global maternal mortality is down 40% since 1995.
- “Germ-line engineering is much further along than anyone imagined.” This means basically editing the DNA of egg and sperm cells at will. I put this in the positive column because it can mean huge health advances. Obviously there are risks and ethical concerns too.
- Somebody has invented an automated indoor compost bin that finicky urbanites might actually consider using.
urban tree canopy targets
This open article in PLOS ONE mentions tree canopy targets in several cities.
Increasing UTC [urban tree canopy] has become a widespread goal, often incorporated into municipal sustainability plans. It has been proposed as a way to mitigate impacts from human-dominated systems on the immediate (e.g. shade and cooling) and global (e.g. carbon capture) environment. Sacramento Tree Foundation has pledged to plant five million trees by the year 2025, an effort that would double the region’s tree canopy cover. Philadelphia has established a goal of increasing tree canopy cover to 30% by the year 2025 (www.phila.gov/green/trees). New York City, Baltimore, and Los Angeles have also announced extensive tree planting initiatives (www.milliontreesnyc.org, www.baltimorecity.gov, www.milliontreesla.org). In addition to regional efforts, there are national and global efforts to bring more awareness to the benefits of UTC cover (Urban Environmental Accord 2005, www.sfenvironment.org/downloads/library/accords.pdf; http://www.plant-for-the-planet-billiontreecampaign.org/Partners/VariousPartners/TreePlanting.aspx). One of the implications of embedding tree canopy goals in sustainability plans is that environmental justice is frequently included as an objective of the plans, and sometimes explicitly linked to UTC. For example, Philadelphia’s 2009 GreenWorks Plan includes goals of increasing tree canopy cover in all neighborhoods highlighting the desire for the equitable distribution of UTC cover (www.phila.gov/green/greenworks/2009-greenworks-report.html).
Incidentally, I lived on a beautiful tree-lined block in Philadelphia until a year ago, when the city cut them all down to replace a major sewer line. I suppose it couldn’t be helped, and they are promising to replant.
Here are a bunch of other articles I’ve stumbled across lately on urban tree benefits:
- The Case for More Urban Trees, from Atlantic CityLab
- New evidence that city trees reduce crime, from Natural Resources Defense Council
- Tree planting in D.C.’s less-green neighborhoods, from Washington Post
The last is slightly negative. There are people who don’t like trees. Most of their beliefs are erroneous, but some are based on nuggets of fact. Some species of trees will invade sewer lines, particularly if they are starved of water and nutrients because they are under sealed pavement. And trees do kill a small, but nonzero, number of people each year. I believe the tree haters are a tiny but highly vocal minority. It’s not worth spending any effort trying to reason with them. The best thing to do is put a tree everywhere but in front of their house. Maybe they will see how nice it is and eventually come around. If they don’t, well, you still have more trees than you had before.
vines
Today, for no particular reason, I’m musing about vines. Like for example, could I grow grapevines or hops up over my roof, or could we grow them up street trees? Rumor has it that vines can damage roofs and kill trees, but there must be vine/tree combinations out there that do just fine together.
February 2015 in Review
This blog got 173 hits in February! Pretty cool, considering I really just meant it as a place to collect my own scattered thoughts and refer back to them later. If 173 out of the 6 billion people out there like it, I am flattered. Okay, I understand there may have been a few repeat visitors. Also, judging from the most popular posts, there is one thing I mention occasionally that people really like: robots!
Negative trends and predictions:
- Fresh Air had an interview with Elizabeth Kolbert, author of The Sixth Extinction. The idea here is that what humans are doing to other species is equivalent in scope to events that have killed off most life on Earth in the past.
- The drought in the western U.S. continues to grind on.
- There are some depressing new books out there about all the bad things that could happen to the world, from nuclear terrorism to pandemics. Also a “financial black hole”, a “major breakdown of the Internet”, “the underpopulation bomb”, the “death of death”, and more!
- Government fragmentation explains at least part of suburban sprawl and urban decline in U.S. states, with Pennsylvania among the worst.
Positive trends and predictions:
- Libraries are starting to go high-tech using warehouse robot technology.
- I had a rambling post on technologies to watch: carbon fiber, the internet of things, self-driving cars and trucks, biotechnology for everything from carbon sequestration to cancer treatment to agriculture, and of course more automation, robots, and artificial intelligence. And yes, Clark W. Griswold’s cereal varnish is a real thing!
- U.S. utility solar capacity is slowly ramping up.
- A new study suggests a sudden, catastrophic climate tipping point may not be too likely.
- Robots can independently develop new drugs.
- According to Google, self-driving taxis are only 2-5 years away.
- Complex ecosystems can be designed.
- Compost toilets may save the world…if we can get over the ick factor and the sawdust problem.
- There are lots of cheap new options for the aspiring high-tech handymen (and women and children) among us. Even better news, we may have reached the point where if you build a robot with your kid in the basement, and he then tells other kids about it, he might not get beat up on the playground.
- New York City has some good examples of green stormwater infrastructure integrated in sidewalk and street design.
One thing that strikes me is that we keep hearing about biotechnology, but we haven’t seen big, obvious impacts in most of our daily lives yet. I suspect biotechnology is like computers and robots in the 70s, 80s, and 90s – slow but steady progress was being made in the background, the pressure was building, and then the wave suddenly broke onto the commercial and public consciousness. I suspect biotechnology is the next big wave that is going to break.
birds, bees, bugs, plants
On the green infrastructure front, there are lots of resources out there on what plants support what kinds of wildlife.
“Bugs” have a PR problem as a group, but they have their charismatic members – bees, butterflies, and dragonflies to name a few. If you support these, you will probably support others by accident. There is plenty of information out there, for example:
The Xerces Society for Invertebrate Conservation has a ton of free publications on plants, pollinators, and design; including bee-friendly plant lists for all regions of the United States and several other countries.
The Lady Bird Johnson Wildflower Center has a ton of free native plant information, including recommended mixes to attract various types of wildlife in all U.S. states and Canadian provinces.
Finally, the Natural Resources Conservation Service (part of the U.S. Department of Agriculture) has free fact sheets on about a thousand plants.
A lot of good can be done for wildlife and humanity on small scraps of land, and even more good could be done if we gave serious thought to how all those scraps of land fit together and connect to larger parks and preserves. So let’s get out and plant something this spring, even if it’s small. Or if you have a scrap of land but you don’t feel like planting anything, find a frustrated armchair gardener who doesn’t have their own scrap and let them plant something on yours.
New York’s sidewalk gardens
Here’s an article with some nice pictures of New York’s sidewalk stormwater gardens. Actually not all are in the sidewalks – in one picture, it appears that they took what could have been a parking space while leaving a nice wide sidewalk for bipedal primates. Looking good guys!
designing ecosystem complexity
This article in Ecological Engineering is about measuring and purposely designing complexity into ecosystems to support biodiversity. I like this idea – certainly grass and trees are a step up from concrete in cities, but there might be some relatively simple design choices that could improve conditions for both wildlife and people without adding effort or cost. We actually expend enormous amounts of time, effort, and money maintaining our grass and trees, whereas natural ecosystems manage to maintain themselves while being more beautiful, diverse, and productive. The first step is to understand the systems better, the second would be to understand what variables we can manipulate, then the third and most difficult step is always translating that new understanding to actions on the ground and getting people to actually take them.
Simplification of natural habitats has become a major conservation challenge and there is a growing consensus that incorporating and enhancing habitat complexity is likely to be critical for future restoration efforts. Habitat complexity is often ascribed an important role in controlling species diversity, however, despite numerous empirical studies the exact mechanism(s) driving this association remains unclear. The lack of progress in untangling the relationship between complexity and diversity is partly attributable to the considerable ambiguity in the use of the term ‘complexity’. Here, we offer a new framework for conceptualizing ecological complexity, an essential prerequisite for the development of analytical methods for creating and comparing habitat complexity. Our framework distinguishes between two fundamental forms of complexity: information-based complexity and systems-based complexity. Most complexity–diversity studies are concerned with informational complexity which can be measured in the field through a variety of metrics (e.g. fractal dimensions, rugosity, etc.), but these metrics cannot be used to re-construct three-dimensional complex habitats. Drawing on our operational definition of informational complexity, it is possible to design habitats with different degrees of physical complexity. We argue that the ability to determine or modify the variables of complexity precisely has the potential to open up new lines of research in diversity theory and contribute to restoration and reconciliation by enabling environmental managers to rebuild complexity in anthropogenically-simplified habitats.
2014 Report Card
It’s taken me a while to get out a “year in review” post for 2014, but anyway, here it is. This won’t be a masterpiece of the essay form. I’m just going to ramble on about some interesting trends and themes from the year, along with a few relevant links.
The critical question this blog tries to answer is, is our civilization failing or not? I’ll talk about our human economy, our planetary system, and make some attempt to tie the two together.
Overall Human Health and Wellbeing. First, there are some very happy statistics to report. For example, worldwide child mortality has dropped almost by half just since 1990. What better measure of progress could there be than more happy, healthy childhoods? And it’s not just about increasing wealth – people in developing countries today have much better health outcomes at the same level of wealth compared to developing countries of the past (for example, Indonesia today vs. the United States when it passed the same income level). It’s hard to argue against the idea that economic growth and technological change have obviously eliminated a lot of human suffering. So, I think the important questions are, will these trends continue? Is the system stable? Can the natural environment continue to support this trend indefinitely? There may also be an important question of whether we had the right to exploit the natural environment to get us to the point where we are now, but that is an academic question at this point.
Financial System Instability. Let’s talk about the stability of our human economic system. The U.S. economy may finally seem to be picking up from the aftermath of the severe 2007-8 financial crisis, but it is certainly far below where it would be if that hadn’t happened and the prior growth trend had just continued since then. The rest of the world isn’t doing so well, however – Europe and Japan are looking particularly slow if not in an outright deflationary spiral, at the same time developing countries appear to be slowing down. Some are calling this a “new normal” for the world economy. More scary than that, the industry-written regulations and perverse incentives allowing the excessive risk taking that caused the crisis have not been fully addressed and the whole episode could recur in the short term.
Thoughts on Ecosystem and Economic “Pulsing”. 2007-8 was a textbook financial crisis – although it was caused by novel forms of money and risk taking beyond the direct reach of government regulators and central banks, it was not that different from crises caused by plain old speculation and over-lending back when there were no central banks around. It’s hard to draw a direct link from the financial crisis to ecosystem services, climate change, or natural resource scarcity. However, if we think about natural ecosystems, they are resilient to outside stressors up to a point – say, moderate fluctuations in temperature, hydrology, or pressure from non-native species. However, say a major fluctuation happens such as a major flood or fire that causes serious damage. In the absence of major outside stressors, the system will eventually recover to its original state, but in the presence of major outside stressors, even if they did not cause the flood or fire, it may never bounce back all the way. In the same way, our human economy may appear resilient to the effects of climate change, ocean acidification, soil erosion, and so forth for a long time, but then when something comes out of left field, like a major financial crisis, war, or epidemic, we may not be able to recover to our previous trend. This probably also applies to the effects of technology on employment, as discussed below. In the absence of major shocks coming from outside the system, we’ll see a long, slow slide in employment and possibly a long, slow rise in energy and food prices, with so much noise in the signal that it will be easy for the naysayers to hold sway for long periods of time. But when those major events happen, we may see sudden, painful changes that we have no obvious way of mitigating quickly.
Technological Change: Artificial Intelligence, Robots, Automation, and Employment. After decades of slow but steady progress, these technologies are really coming into their own. Robots are being used to keep miners in line and to drive cars, for example. Manufacturing has become a high-tech industry. As computers and machines get better at performing more and more skilled jobs (book-keeping is one example), there is gradually less demand for the medium-skilled workers who used to do those jobs. High-skilled workers like computer programmers are doing very well, although I presume the automation will gradually creep higher and higher up the chain, so today’s safer jobs will be less safe tomorrow. At the same time these medium-skilled workers in developed countries are getting squeezed out, developing countries are not benefiting like they used to from their large pools of low-skilled workers as manufacturing becomes more and more automated, and can be done cost-effectively closer to consumers in richer countries.
Will our society recognize and solve this employment problem? American corporate society, and its admirers around the world, are unlikely to. Something very similar to this happened with agricultural automation in the early- to mid-20th century, and with globalization in the mid- to late-20th century. As agriculture became more automated, many displaced workers moved from rural areas in the U.S. southeast to urban areas in the U.S. northeast, looking for factory work. Unfortunately, the factory jobs that existed previously were being moved to developing countries with abundant low-wage labor. The pockets of poverty, unemployment, and social problems created by these forces have not been adequately addressed to this day. To the individual worker, it doesn’t much matter whether your job is being taken by a local robot or an overseas human. Unemployment created by technological forces today could resemble what was created by globalization yesterday, only on a much larger scale. We can only hope that the larger scale will drive real political solutions, such as better education and training, sharing of available work, and more widespread ownership of the labor-saving technology.
Of course, one of the earliest and probably the most shameful example of a modern capitalist system generating wealth for an elite few at the expense of workers is the American slavery system of the 18th and 19th centuries. We just can’t trust amoral, self-interested private enterprise to maximize welfare in the absence of a strong moral compass coming from the larger society. Let’s stop pretending otherwise.
Another example of extreme corporate immorality: Public apathy over climate change in the U.S. may have been manufactured by a cynical, immoral corporate disinformation campaign over climate change taken right out of the tobacco companies’ playbook.
The Gospel of Shareholder Value. There is an important debate over whether people who run corporations have any ethical responsibility to anything other than profit seeking. Well duh, everyone on Earth has an ethical responsibility. Case closed, as far as I’m concerned. There is even evidence that the ideology of profit maximization is a drag on innovation. Except billions of people out there who have worshiped at business schools would disagree with me. And I don’t want to offend anyone’s religion. Noam Chomsky had a quote that I particularly loved, so I am going to repeat it here:
In market systems, you don’t take account of what economists call externalities. So say you sell me a car. In a market system, we’re supposed to look after our own interests, so I make the best deal I can for me; you make the best deal you can for you. We do not take into account the effect on him. That’s not part of a market transaction. Well, there is an effect on him: there’s another car on the road; there’s a greater possibility of accidents; there’s more pollution; there’s more traffic jams. For him individually, it might be a slight increase, but this is extended over the whole population. Now, when you get to other kinds of transactions, the externalities get much larger. So take the financial crisis. One of the reasons for it is that — there are several, but one is — say if Goldman Sachs makes a risky transaction, they — if they’re paying attention — cover their own potential losses. They do not take into account what’s called systemic risk, that is, the possibility that the whole system will crash if one of their risky transactions goes bad. That just about happened with AIG, the huge insurance company. They were involved in risky transactions which they couldn’t cover. The whole system was really going to collapse, but of course state power intervened to rescue them. The task of the state is to rescue the rich and the powerful and to protect them, and if that violates market principles, okay, we don’t care about market principles. The market principles are essentially for the poor. But systemic risk is an externality that’s not considered, which would take down the system repeatedly, if you didn’t have state power intervening. Well there’s another one, that’s even bigger — that’s destruction of the environment. Destruction of the environment is an externality: in market interactions, you don’t pay attention to it. So take tar sands. If you’re a major energy corporation and you can make profit out of exploiting tar sands, you simply do not take into account the fact that your grandchildren may not have a possibility of survival — that’s an externality. And in the moral calculus of capitalism, greater profits in the next quarter outweigh the fate of your grandchildren — and of course it’s not your grandchildren, but everyone’s.
Our Ecological Footprint. WWF issued an updated Living Planet Report in 2014 suggesting that our annual consumption of natural resources (including the obvious ones like energy and water extraction, straightforward ones like the ability to grow food, but also the less obvious ones like ability of the oceans and atmosphere to absorb our waste products) is continuing to exceed what the Earth can handle each year by at least 50%. We’re like spoiled trust fund babies – we have such incredible resources at our disposable, we never learn to live within our means and one day the resources run out, even if that takes a long time. As we recover from the financial crisis, we have a chance to do things differently, but the connections are not being made to the right kinds of investments in infrastructure, skills, and protection of natural capital that would set the stage for long-term sustainable growth in the future.
Other Big Stories from 2014:
- World War I. 100 years ago, World War I was in full swing. Remember The Guns of August? Well, that was August 1914 they were talking about. Let’s hope we’re not about to blunder into another conflict. But (and I’m cheating a little here because I read this in 2015), the World Economic Forum named “interstate conflict” as both high probability and high consequence in its global risk report.
- Ebola. Obviously, Ebola was a very bad thing that happened to a whole lot of people. To those of us lucky enough that we weren’t directly in its path, it is a chance to selfishly reflect whether Ebola or something even worse could be coming down the pike. Let’s hope not.
- Severe Drought and Water Depletion in the Western U.S.: California has been in the midst of a historic drought, although they got some rain recently. Some are describing this as the new normal. Besides rainfall, glaciers, snowpack, and groundwater all seem to be disappearing in some important food-growing areas.
- Solar grid parity is here! At least some places, some times…
Conclusion. Yes, I think we are on a path to collapse if nothing changes. And I don’t see things changing enough, or fast enough. There are glimmers of hope though. Lest you think I offer only negatives and no solutions, here are two solutions I harp on constantly throughout the blog:
- Green infrastructure. This is how we fix the hydrologic cycle, close the loop on nutrients, begin to cleanse the atmosphere, protect wild creatures and genetic diversity, and create a society of people with some sense of connection to and stewardship over nature. Don’t act like it’s such a big mystery. It’s known technology. There has been plenty written about trees, design of wildlife corridors and connectivity, for examples. There is simply no excuse for cities to do such a crappy job with these things.
- Muscle-Powered Transportation. Cars are clearly the root of all evil, the spawn of Mordor, as I pointed out several times (sorry, I just sat through 6+ hours of Hobbit movies). Unless you are perhaps that rare hobbit who can own a car without your morals being completed corrupted by its evil powers. But for the rest of us, I explained several times why getting rid of cars would be good. Here is just one example:
One of the most important things we can do to build a sustainable, resilient society is to design communities where most people can make most of their daily trips under their own power – on foot or by bicycle. It eliminates a huge amount of carbon emissions. It opens up enormous quantities of land to new possibilities other than roads and parking, which right now take up half or more of the land in urban areas. It reduces air pollution and increases physical activity, two things that are taking years off our lives. It eliminates crashes between vehicles, and crashes between vehicles and human bodies, which are serial killers of one million people worldwide every year, especially serial killers of children. It eliminates enormous amounts of dead, wasted time, because commuting is now a physically and mentally beneficial use of time. There is also a subtle effect, I believe, of creating more social interaction and trust and empathy between people just because they come into more contact, and creating a more vibrant, creative and innovative economy that might have a shot at solving our civilization’s more pressing problems.
green infrastructure, happiness, and the ginkgo-stinkgo tree
Do trees make people happy? Well yes, I think most people subjectively just have a sense this is true. But for the cynics out there, there is also hard scientific evidence. People have tried all sorts of economic approaches – correlations with real estate markets and willingness-to-pay surveys – for example, to try to estimate the value people place on trees. (Can you measure happiness in dollars? The average man on the street might say no, but the average economist might say it’s the best of many imperfect options for measuring value.) Medical researchers have tried having people walk around cities with brain scanners on their heads. This is a new one to me though – correlating tree coverage with antidepressant prescriptions. And the correlation is there.
Growing evidence suggests an association between access to urban greenspace and mental health and wellbeing. Street trees may be an important facet of everyday exposure to nature in urban environments, but there is little evidence regarding their role in influencing population mental health. In this brief report, we raise the issue of street trees in the nature-health nexus, and use secondary data sources to examine the association between the density of street trees (trees/km street) in London boroughs and rates of antidepressant prescribing. After adjustment for potential confounders, and allowing for unmeasured area-effects using Bayesian mixed effects models, we find an inverse association, with a decrease of 1.18 prescriptions per thousand population per unit increase in trees per km of street (95% credible interval 0.00, 2.45). This study suggests that street trees may be a positive urban asset to decrease the risk of negative mental health outcomes.
And in other urban tree news, you can collect ginkgo berries, take out the nuts, roast them and eat them. The only problem being that they stink to high heaven and are mildly poisonous. Ginkgos are very interesting trees though, sort of an ancient cross between trees and ferns if you believe this article.
Believed to be truly indigenous to only a single province in China , this 270 million year old species belongs to an ancient lineage of species that have since disappeared for one reason or another over the past few millennia, making Ginkgo biloba (known as a ‘living fossil’) the sole extant representative of what was once a vast and diverse group of organisms. In fact, the ginkgo tree is so unlike any other living plant species that this tree has it’s own genus, family, order, class and division. To put this into terms that may be easier to conceptualize: the only thing that ginkgo trees have in common with other plants is they are also plants. This means that pretty much everything about their genetic make-up, physiology, general behavior, reproductive strategies (including their mobile sperm; a trait particular to ferns, cycads and algae) and even their ability to photosynthesize is anywhere between slightly-off to fundamentally different from any other living plant. Oh, and you can eat it’s seeds…
It’s a bit of a messy operation collecting the seeds which are often produced profusely by female trees and lie unmolested by fungi, insects or most pests of any kind save for some adventurous squirrels which occasionally eat the seeds. I find some rubber or latex gloves and a plastic bag are your best bet for collecting the seeds in addition to some grubby clothes that you don’t mind smelling cheesy for a little while. The scent from the fruit tends to linger when it gets on fabric or clothing and so you might want to try extra hard to remember not to wear anything that you are particularly fond of when engaging in the participatory act of ginkgo seed collecting.
I think it’s cool that some people do this, but I personally am not going to take up this hobby right now.