Greenhouse Gassed

Carbon dioxide spells indigestion for food chains

“The last thing I’d want to get reincarnated as is a caterpillar,” says David N. Karowe. He doesn’t have anything personal against caterpillars; it’s just that the future doesn’t look very rosy for the fuzzy leaf chewers.

These sheep in New Zealand may teach scientists how livestock will fare as the carbon dioxide content of the atmosphere goes up.