Here is the BBC raising the alarm about meat consumption:

Global consumption of meat needs to fall to ensure future demand for food can be met and to help protect the environment, a study says.

Research from two universities estimates greenhouse gases from food production will go up 80% if meat and dairy consumption continues to rise at its current rate.

Meanwhile National Geographic has a long, interesting article about what our ancestors actually ate. The answer: pretty much everything and anything they could get their hands on. Some societies ate a lot of meat while others did not. Some made a big deal of meat, but filled up on a steady diet of twigs and berries in between successful hunts.

In other words, there is no one ideal human diet. Aiello and Leonard say the real hallmark of being human isn’t our taste for meat but our ability to adapt to many habitats—and to be able to combine many different foods to create many healthy diets. Unfortunately the modern Western diet does not appear to be one of them.