"The U.S., European Union and 12 of the world's largest nations plan to embrace 'an aspirational goal' of reducing emissions of global-warming gases by 50% by 2050, according to a draft declaration by world leaders set for release next week in Italy."

If the United States wants to build a market-based approach to reducing carbon dioxide emissions, it should learn from Europe's failures.

"California can develop its own standards on greenhouse gas emissions from cars and trucks, though it agrees not to toughen the standards before 2017. Automakers agree to drop lawsuits."

"The House narrowly passed an ambitious climate bill [Friday] that would establish national limits on greenhouse gases, create a complex trading system for emission permits and provide incentives to alter how individuals and corporations use energy."

"The House could vote today on a measure to cap U.S. greenhouse gas emissions, with Democratic leaders predicting a tight victory for a behemoth bill that has grown more complex with each compromise."

"Major economies including the United States and China are considering setting a goal of halving world greenhouse gas emissions by 2050 when they hold a summit in Italy next month, a draft document showed."

"Democratic leaders in the U.S. House of Representatives hope to debate and pass a climate change bill on Friday, although negotiations were continuing with farm-state lawmakers who have concerns, House Majority Leader Steny Hoyer said on Tuesday."

"President Obama on Tuesday gave a full endorsement to energy and climate change legislation now pending before the House, calling it 'extraordinarily important.'"

Four island nations facing inundation from sea-level rise wrote President Obama, asking him to support their efforts to control HFCs.

The House climate bill would cost on average $175 per household, the Congressional Budget Office estimated Friday. Maneuvering to get the bill to the House floor continues.

"Climate change has already brought warmer temperatures, rising sea levels and melting glaciers. Now, researchers believe global warming will cause major shifts in wildfire patterns around the world."

Methane emissions from cows (cow burps) is a major source of greenhouse warming. Yet they are being left out of the climate change bill now before Congress -- because of an adept lobby campaign.

Scientists are pretty certain climate change is going to cause the sea level to rise. It's happening already, actually. In communities around the Chesapeake Bay, people are getting a sneak preview.

"The United Nations on Tuesday raised the prospect of 'megadisasters' affecting millions of people in some of the world's biggest cities unless more is done to heed the threat of climate change."

"Man-made climate change could bring parching droughts to the Southwest and pounding rainstorms to Washington, put Vermont maple sugar farms out of business and Key West underwater over the next century, according to a federal report released yesterday."