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Obama administration says the US is already grappling with climate change; experts warn federal action is needed now
Scientists report on NASA's Operation IceBridge in Greenland, which tracks rapidly melting glaciers.
An unprecedented massive legal campaign led by young Americans is playing out in courtrooms across the nation
Rain, floods are latest from storm system that began in Arkansas and moved south, killing at least 37 people
Though overall levels are down, warmer temperatures through climate change are leading to higher ozone pollution
The public must challenge fruitless annual climate negotiations
After avalanche, at least 70 percent of climbers canceled their expeditions and left base camp, officials say
Population growth is an ecological problem, contraception is a solution
As Americans' concern about environment wanes, conservatives say their values should be part of the conversation
Measures would give legal backing to Beijing’s newly declared war on pollution