Greening the Herds - Trying to Limit Cows' 'Emissions' - NYTimes.com

Sweetening cow breath is a matter of some urgency, climate scientists say.

US, China need to lead on climate change: US senator

"Either we will create the necessary momentum to finally galvanize a global response, or else we risk a global catastrophe," [Kerry] said.

"My message to the Chinese was simple: America understands that we have an obligation to lead. But you need to understand that, politically speaking, America will not enter into a global treaty without a meaningful commitment from China to be part of the solution," he said.

The committee's ranking Republican, Senator Dick Lugar, said China's responses to climate change to date have been "complex and contradictory."

"The American domestic debate on the issue will be profoundly influenced by perceptions of China's willingness to set aside doctrinaire positions and agree to verifiable steps to limit greenhouse gas emissions," he warned.