Agence France-Presse: French President Nicolas Sarkozy on Thursday unveiled a new carbon tax to help combat global warming, calling it a “fiscal revolution” and overriding strong public opposition to the plan. French President Nicolas Sarkozy (2nd right) working on heat exchange in Culoz. French President Nicolas Sarkozy on Thursday unveiled a new carbon tax to help combat global warming, calling it a “fiscal revolution” and overriding strong public opposition to the plan. The new levy on oil, gas …