And now, ladies and gents, the moment you’ve all been waiting for. The Nobel Prize-winning Intergovernmental Panel on Climate Change, with input from delegates of more than 140 countries, has synthesized three previous reports into one 70-page summary document and a 20-page summary of that summary, meant to be an “instant guide” to policymakers who will meet in Indonesia next month to discuss climate-change next steps. The synthesis, approved and being formally adopted on Saturday, declares: “Warming of the climate system is unequivocal.” Human activity is more than 90 percent likely to be the cause, and “could lead to abrupt and irreversible climate changes and impacts.” Says Hans Verolme of WWF, “After this report, there are no politicians left who can argue they don’t know what climate change is or they don’t know what to do about it.” Oh? We bet we know at least one.

Grist thanks its sponsors. Become one.