Climate: A few degrees less
Famous American economist and Director of The Earth Institute in New York, Jeffrey Sachs, has a vision.
He intends to avoid world temperature rising by more than 2°c before 2050. The challenge is crucial because beyond these extra 2°c, the Earth is bound to experience dramatic situations, or worse big catastrophes. It is essential to divide by two the greenhouse gas emissions, which mainly come from the production and use of fossil fuels in transport, building, and industry.