More regular heat waves, heavier precipitation and storms, melting Arctic ice, rising sea levels... Most of these natural phenomena are linked to global warming. However, there is always someone who tells us that "the climate is not warming up because it is getting colder" or "it is not man's fault, it is the sun! They are called climate sceptics. Who are they really?
What is the difference between climate and weather? Why do we always talk about not exceeding 2°C? What is the impact of greenhouse gases? Are there economic, sociological or political issues at stake? What can we do about it?