I clicked on this article from Woodhouse about new paving technologies expecting to hear about porous pavement. But it turned out to be all about paving with solar panels:

The company’s aim is to reduce carbon emissions by paving currently tarmacked surfaces with solar panels, turning a previously unproductive landmass into a renewable energy powerhouse.

The solar energy collected by the smart surface could be used to feed the grid during the day time, or even power things such as heating elements under the surface to clear ice and snow from the roads in the winter. Eventually, it might be possible to power electric cars as they drive along.

Pavement covers enormous areas in our cities, so this could be huge. On the other hand, the lack of any mention of stormwater worries me slightly. There is a lot more time and effort going into developing better materials to capture energy than to manage water, when both are important. In fact, when it gets to the point (now in some places, very soon in others) where people can make serious money installing solar panels on their rooftops and paved surfaces, that could even come into conflict with stormwater management opportunities (green roofs and porous pavement being two examples). On the other hand, my water bill has been creeping up to the point where it is not that much less than my electric and natural gas bills. So where the economic drivers have been overwhelmingly on the side of energy until recently, water may be catching up. Of course, we want to find materials and approaches that do both, so let’s get to work on that.