Speaking at a green energy conference in Abu Dhabi, the French president said that people had an obligation to protect the planet for future generations.
"If we don't act, if we don't do anything, if we don't invest anything, we can be sure that we will have a catastrophe very soon. We have to have confidence to invest in the new energy. We can act together to create this world of renewable energy," he told delegates at the World Future Energy Summit.
Nearly 200 countries met in neighbouring Qatar in December to negotiate steps to cut carbon emissions, resulting in a modest agreement to continue the Kyoto protocol for a small group of countries and the laying of groundwork to agree on a global treaty in 2015.