As part of a new climate deal with the U.S., China is also agreeing to other measures, paving the way for progress at U.N. talks in Paris.
This unprecedented triumvirate is generating some real momentum toward climate action.
2015 is on track to be the hottest year on record.
Outgoing PM Tony Abbott is a climate denier. Brand-new PM Malcolm Turnbull is not, but he still isn't planning to change policy anytime soon.
But his visit to the United States could change all that.
A new study suggests we have a fighting chance to avoid catastrophic warming.
In a joke-packed speech to the White House Correspondents' Association, Obama got so "angry" at climate deniers that he scared off his "anger translator."
A new study suggests China's tough new pollution standards might actually be working.
By next year, nearly half of global GDP will be covered by cap-and-trade programs.