Man alone is not responsible for climate change and the world has far bigger problems than “global warming,” said former French President Nicolas Sarkozy. “Climate has been changing for four billion years,” Sarkozy, who’s running for president again, told business leaders at the Institut de l’enterprise on Wednesday. “Sahara has become a desert, it isn’t because of industry.” “You need to be as arrogant as men are to believe we changed the climate.”