"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."

"Proposals to impose 'carbon tariffs' on imported products will violate the rules of the World Trade Organization as well as the spirit of the Kyoto Protocol, China's Ministry of Commerce said."

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

"An El Nino weather pattern this year appears almost certain, Australia's Bureau of Meteorology said on Wednesday in a revised forecast, raising the prospect of drought in Australia and a even weaker monsoon in India."

"The US, China, and dozens of other countries are meeting [this week] in Egypt to chart the course of a new international agency aimed at promoting renewable energy."

"Where the natural gas from the Alaska Natural Gas Pipeline will end up is a murky question. ..."

"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."

"International Whaling Commission members agreed Wednesday to extend negotiations over the disputed hunting of the marine mammals for a year, avoiding a disastrous split in the group."

From an immense mansion in the Hamptons, Ira Rennert oversees a private industrial empire that includes one of the most toxic sites in the world.

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