Researchers led by a Washington State University biologist have found that arid areas, among the biggest ecosystems on the planet, take up an unexpectedly large amount of carbon as levels of carbon dioxide increase in the atmosphere. The findings give scientists a better handle on the earth’s carbon budget – how much carbon remains in…

SAN FRANCISCO, March 23, 2010 — As you stroll down restaurant row and catch the wonderful aroma of food — steaks, burgers, and grilled veggies — keep this in mind: You may be in an air pollution zone. Scientists in Minnesota are reporting that commercial cooking is a surprisingly large source of a range of…