Hundreds of invitation-only delegates are expected to attend an Ontario-hosted conference on the climate this week that will feature speakers such as former U.S. vice-president Al Gore and Mexican President Felipe Calderon.
China on Tuesday announced its contribution to a global climate pact that's supposed to be adopted this year in Paris, pledging to reduce the intensity of its carbon emissions and to halt their growth by 2030.
A Dutch court ordered the government Wednesday to slash greenhouse gas emissions to help fight global warming, a landmark ruling in a case brought by hundreds of concerned citizens that could pave the way for similar legal battles around the world.
Failure to act on climate change could cause an estimated 57,000 deaths a year in the United States from poor air quality by 2100, the Obama administration argued in a report released Monday that warns of dire effects of global warming.
A federal appeals court on Tuesday threw out a pair of high-profile lawsuits challenging the Obama administration's sweeping plan to address climate change, saying it's too early to challenge a proposed rule that isn't yet final.