Peter Collinge
5/30/2020 11:06 AM
In researching the carbon impact of concrete, I was surprised to learn that the cement industry releases 3 times as much CO2 as the aviation industry. Do other materials have this kind of impact? Of course, steel production involves high heat, of produced by fossil fuels. Beef has a high greenhouse effect due to methane released by cattle (mostly via belches). We can't avoid these items totally but can reduce their use while science finds ways to produce them with less impact. I'm not ready to give up beef completely, but we've been trying to have it as an very occasional treat rather than a regular part of our diet.