Wind turbine farm owned by PacifiCorp
Media playback is unsupported on your device

Green power investment 'needs to treble'

13 April 2014 Last updated at 14:54 BST

Scientists from around the world are calling for a big shift to renewable energy as a solution to the problems caused by global warming.

The Intergovernmental Panel on Climate Change is expected to recommend at least a trebling in the use of wind and solar power.

Matt McGrath reports.

Related Topics