Andrew Simms: Missed opportunity for green economy
Author, economist and environmentalist Andrew Simms believes that following the 2007-08 financial crisis there was a missed opportunity for countries to re-evaluate their economic policies and promote green stimulus spending.
It was a "great political and economic mistake", he said.
The author of Cancel the Apocalypse added that if people wanted jobs and lower energy bills economies needed to be "re-engineered".
You can watch the full interview on BBC World News on Wednesday 24 April at 14:30 and 20:30 GMT and on the BBC News Channel on Thursday 25 April at 00:30 BST.