In my opinion, if we leave the solution to legislatures, most of humanity will be dead in a century. Unless, of course, the legislatures are taken over by tech

In my opinion, if we leave the solution to legislatures, most of humanity will be dead in a century. Unless, of course, the legislatures are taken over by techical people who actually understand how dire the threat is. Renewable energy sources were carefully blocked for decades because legislators liked their jobs more than they liked serving the future. OTOH, your point#2 is spot on. And, without an equally proportional response, very soon, there is little chance of staying below 3%. After which, at some point, the millions of frightened, displaced, and dying people will END the rest.