US and China reach emissions deal establishing peak by 'around 2030'
US President Barack Obama comments on the situation in Ukraine following a tour of a classroom at Powell Elementary School on March 4, 2014 [AFP]

China has agreed a target for its emissions of greenhouse gases to peak by "around 2030", the White House said Wednesday as U.S. President Barack Obama met Xi Jinping for talks in Beijing.

It is the first time China -- the world's biggest polluter -- has set a date, even approximate, for its emissions to stop increasing and the White House said in a statement that Beijing would "try to peak early".

At the same time the U.S. set a goal to cut emissions of the gases blamed for climate change by 26-28 percent from 2005 levels by 2025.