"COPENHAGEN -- President Obama told leaders of 193 nations here Friday that their collective will to address climate change "hangs in the balance" and urged both developed and developing countries to accept a climate change agreement he acknowledged was far from perfect."

"President Barack Obama met other world leaders in a last push for a new global climate deal on Friday, after negotiators failed to reach a deal on carbon cuts in all-night talks."

"Negotiators at the United Nations climate summit scrambled Wednesday to bridge multibillion-dollar disagreements as President Barack Obama and other world leaders prepared to descend on the Danish capital Friday." ... "US Secretary of State of State Hillary Clinton Thursday proposed that major economies including the US come up with $100 billion a year over the next decade for developing nations, in an eleventh-hour effort to break an impasse." Secretary of State Hillary Clinton arrived in Copenhagen with new offers of conditional aid, but it was unclear whether this would be enough to break the logjam.

"Hardline anti-whaling activists prepared on Tuesday to pursue Japan's Antarctic whaling fleet with support from Daryl Hannah, who criticized Greenpeace for opting out of the annual chase."

"COPENHAGEN — Police officers fired tear gas and wielded batons on Wednesday to beat back hundreds of demonstrators outside the global climate meeting here, as a police spokesman said 250 people had been arrested."
 

"Former US vice president and environmental activist Al Gore called Tuesday for world leaders to meet in Mexico City in July to complete a climate treaty under negotiation in Copenhagen."

"Pope Benedict XVI called for urgent action to protect the environment, saying Tuesday that climate change and natural catastrophes threaten the rights to life, food, health -- and ultimately peace."

"Negotiators have all but completed a sweeping deal that would compensate countries for preserving forests, and in some cases, other natural landscapes like peat soils, swamps and fields that play a crucial role in curbing climate change."

"China and the United States were at an impasse on Monday at the United Nations climate change conference here over how compliance with any treaty could be monitored and verified."