Eiffel Tower lit up as historic climate pact enters into force The Eiffel Tower is lit up in green lights as a hard-fought pact to stave off worst-case-scenario global warming comes into force. Dubbed the Paris Agreement, it is the first-ever pact binding all the world's nations, rich and poor, to a commitment to cap average global warming by curbing planet-warming greenhouse gases from burning coal, oil and gas. IMAGES