Prime Minister Tony Abbott defended Australia's carbon pollution reduction target as in line with those of other countries after the nation's climate change authority criticised the goal as "disappointing".
President Barack Obama described climate change as one of the key challenges of our time as he announced the first ever limits on US power plant emissions.
President Barack Obama praised the pope's call for action on climate change and said the United States should lead global efforts to cut carbon pollution and bolster clean energy sources.
US President Barack Obama warned that climate change was making natural disasters worse, as he toured the National Hurricane Center ahead of the annual storm season.
French President Francois Hollande warned that time was short for a year-end deal on climate change and called on world leaders to unlock the complex process in the months ahead.
A winter storm that wreaked travel chaos across the US northeast wound down, but hundreds of thousands of people were left without power on the Thanksgiving holiday.
By 2024, more than half of summers in eastern China will be as hot as in 2013, when the region was hit by a record-busting heatwave and devastating drought.