The Environmental Protection Agency proposed stricter new limits on smog Thursday that could have big health benefits, but could also cost up to $90 billion for corporations and the government to implement. The proposal would limit smog to…

Fresh off of his reporting trip to Copenhagen for international climate talks, Ray Suarez stopped by the Rundown Monday to talk to Hari Sreenivasan about the summit's conclusions and lingering questions over the climate agreements reached. Watch their conversation…

A truly environmentally friendly international climate summit would probably have to take place via the Internet, with all parties and observers comfortably parked in their favorite chairs at home. But that would mean no wheeling and dealing in the corridors,…

President Barack Obama told world leaders Friday that it was time to come together on a climate change agreement, calling out stubborn positions that have stood in the way of progress, namely between rich and poorer countries.