[CNN] Stamping camembert with a “carbon footprint” rating. Charging Parisians for the empty Bordeaux bottles they discard. Banning high speeds through the pasture-lined highways of the Loire Valley. The Eiffel tower with all lights shut down during a five-minute “lights-out” on Tuesday. France is trying to clean up its act, readying measures this week aimed at reversing its image as environmental laggard and making it a pioneer in the fight against global warming and other threats to the Earth’s well-being.