Can voluntary government action be trusted to tackle climate change?

Do voluntary government commitments offer the solution to climate change? UN climate change talks are entering their second day in Durban, South Africa, aiming to come up with a settlement constraining greenhouse gas emissions to replace the Kyoto protocol, which expires in a year. Sir David King, the former chief scientific adviser to the government and Jonathon Porritt, environmentalist and co-founder of the Forum for the Future, discuss whether agreement is possible. #climatechange ##COP17 #durban #r4today