One active intervention would be a permanent individual gasoline-rationing program. No sells, no trades, decreasing allotments year-by-year. Thus encouraging -planned- driving, -smaller- vehicles.

The world needs to declare a WAR ON CO2 and put it on a war-time footing. Further considerations of tinkering around with an environment we've already de-stabilized only shows we haven't learned our lesson. We don't know enough to know what's safe... except the way things were.