"Representatives of the world's 17 biggest carbon polluters kicked off a week of high-stakes talks on climate change Thursday with a discussion at the US State Department."

Worldwide sea-surface temperatures for this August and this summer were the warmest in at least 180 years, the National Climatic Data Center said. The sea-ice minimum was well behind the extraordinary retreat of 2007.

"Climate change activists reacted sharply yesterday to indications from Senate Majority Leader Harry Reid (D-Nev.) that cap-and-trade legislation may have to wait until 2010, warning that the delay could derail international negotiations in Copenhagen."

The U.S. State Department issued an international proposal jointly with the governments of Canada and Mexico this week to phase down the production and consumption of hydrofluorocarbons (HFCs) starting as early as 2011.

"Democratic leaders in the Senate said last night they may wait until next year to take up climate change legislation, jeopardising the prospect of reaching a deal to avoid the most catastrophic consequences of global warming."

"Failure to agree a new UN climate deal in December will bring a "global health catastrophe", say 18 of the world's professional medical organisations."

"China's President Hu Jintao will present China's new plans for tackling global warming at a United Nations summit on climate change later this month, the country's senior negotiator said on Tuesday."

"Interior Secretary Ken Salazar launched the Obama administration's first coordinated response to the impacts of climate change Monday, which he said would both monitor how global warming is altering the nation's landscape and help the country cope with those changes."