More than 30,000 diplomats have converged on Paris, France, for what is being called "one of the most important international conferences in history."
"Tackling climate change is a shared mission for mankind," said Chinese President Xi Jinping, the head of the world's largest carbon emitter. "All eyes are now on Paris."
"If we act here, if we act now," President Obama added, "if we place our short-term interests behind the air our young people will breathe... then we won't be too late for them."
"Here in Paris," French President Hollande declared, "we will decide on the very future of the planet."
Perhaps I'm too skeptical for my own good, but that's very similar to what world leaders said in 1997 just before the Kyoto Accords. And those have proven to be little more than lip service.
Even if 100% of the Kyoto requirements are followed by 100% of the 192 countries that signed them, they will deliver less than 0.02° Celsius in cooling by 2050 despite costing hundreds of billions of dollars.
Is that worth it?
I have no idea - I'm not a scientific expert.
But I do know beyond any shadow of a doubt that trillions of dollars are going to get set in motion no matter what happens in La Ville Lumière.