Jeffrey Sachs features on “You ask the Questions” in today’s Independent. There are loads of interesting questions and answers - Sachs remains positive about China’s growth potential although he expects it to decelerate to around seven per cent in the years ahead. Here he is on a question about carbon trading .... good evaluation here for students preparing for a question on carbon trading versus carbon taxes versus other policy measures:

“There is a good case for putting a price on carbon emissions but it is more straightforward to do it as a tax rather than a system of tradable permits. It would be easier to tax carbon at source – coal, oil, and gas companies. Tradable permits or carbon taxes will not help develop low-emission technologies. We need to combine carbon pricing with initiatives to promote sustainable energy and farming technologies.”

Catch the remainder of his article here