· Author of landmark report says 2% of GDP is needed
· Inaction would mean far greater economic damage

The author of an influential British government report arguing the world needed to spend just 1% of its wealth tackling climate change has warned that the cost of averting disaster has now doubled.

Lord Stern of Brentford made headlines in 2006 with a report that said countries needed to spend 1% of their GDP to stop greenhouse gases rising to dangerous levels. Failure to do this would lead to damage costing much more, the report warned - at least 5% and perhaps more than 20% of global GDP. ... Read full article