The researchers found that growing mealworms released less greenhouse gases than producing cow milk, chicken, pork and beef.

MSN: Mealworms: They're not just for breakfast anymore...

Mr. CHRIS BASKIND: Everything seems to be being reduced to how much carbon dioxide am I producing, or what kind of greenhouse gases we should be finding a way to sequester.

NPR: Environmentalists Point Beyond Global Warming

These gases are then used to clean up smog-producing nitrogen oxides, or NOx.

FORBES: Clearing the Air

The exhaust gases are at several hundred degrees, and so the water is instantly vaporised, producing huge clouds of steam.

BBC: Key tests for Skylon spaceplane project