Climate change: Curbing methane emissions will 'buy us time'

An aggressive campaign to cut methane emissions can buy the world extra time to tackle climate change, experts say.

One of the key findings in the newly released IPCC report is that emissions of methane have made a huge contribution to current warming.

The study suggested that 30-50% of the current rise in temperatures is down to this powerful, but short-lived gas.

Major sources of methane include agriculture, and leaks from oil and gas production and landfills.