The UN's top climate official defended a global trading scheme to reduce greenhouse gas emissions after the US government released a report questioning its efficacy.
Talks start Monday in Poland for a post-Kyoto climate treaty.
President Medvedev visits Venezuela this week as a Russian nuclear warship leads joint maneuvers.
How did we become so dependent on a single corporation?
Barack Obama delivered a brief video message Wednesday to the Governors' Global Climate Summit in Beverly Hills, Calif., in which he unequivocally affirmed the scientific basis of climate change and vowed to take action on cutting carbon emissions, in spite of the troubled global economy.
Sixty-nine percent of those polled in 21 countries say utility firms should be obliged to use more renewable resources, even if this would increase their monthly bills.
Experts fear the credit crunch will discourage governments worldwide from turning to taxpayers for assistance in climate-change efforts.
The goal is continuity in international relationships with a clear break from Bush’s approach.