Chairperson of the Climate Institute, Washington, DC

" This is a need for tough measures to check artifically induced climate change"

• The biggest emitters must make the biggest reductions to induce others to follow suit.

• Governments must take difficult decisions. They must use economic incentives (to reduce emission of greenhouse gases).

• There has to be a debate on whether the climate is actually changing. The complexity in the area is very great. Does warming in one area lead to cooling in another?

- The nature of society makes it difficult to make reductions in greenhouse gas emissions. We need to change our policies, especially those regarding transport and energy.

• Tradable permits are just an excuse for not doing anything.