About twenty years ago, many scientists wondered on the existence or not of a global warming proven. The observations and measures carried out these recent years raised more questions about the issue.

Our planet is warming up. The last 20 years were the hottest in 400 years, according to several studies.

An upsurge in the amount of extreme weather events, such as wildfires, heat waves, and strong tropical storms, is attributed in part to climate change by some experts and is constantly raising the issue of global warming.