This is yet another wakeup call: Those who deny the science or choose excuses over action are playing with fire.
Once again, the science grows clearer, the case grows more compelling, and the costs of inaction grow beyond anything that anyone with conscience or common sense should be willing to even contemplate.
Boil down the IPCC report and here's what you find: Climate change is real, it's happening now, human beings are the cause of this transformation, and only action by human beings can save the world from its worst impacts.
This isn't a run of the mill report to be dumped in a filing cabinet. This isn't a political document produced by politicians.
It builds on the most authoritative assessments of knowledge on climate change produced by scientists, who by profession are conservative because they must deal in what is observable, provable and reviewable by their peers.
If this isn't an alarm bell, then I don't know what one is. If ever there were an issue that demanded greater cooperation, partnership, and committed diplomacy, this is it.
What one country does impacts the livelihoods of people elsewhere -- and what we all do to address climate change now will largely determine the kind of planet we leave for our children and grandchildren.
With those stakes, the response must be all hands on deck. It's not about one country making a demand of another. It's the science itself, demanding action from all of us.
The United States is deeply committed to leading on climate change. We will work with our partners around the world through ambitious actions to reduce emissions, transform our energy economy, and help the most vulnerable cope with the effects of climate change.
We do so because this is science, these are facts, and action is our only option.