> Simply limiting CO2 output might just not be enough to avoid a catastrophic outcome in the future. All but one of the IPCC scenarios now require massive CO2

> Simply limiting CO2 output might just not be enough to avoid a catastrophic outcome in the future. All but one of the IPCC scenarios now require massive CO2 sequestration on the order of half of current yearly emissions starting in 2050. --> Current emissions are 40 Gt CO2/year, the sequestration is calculated at 20 Gt CO2/year, the optimists of the IPCC give us 4-500 Gt CO2 further leeway of emissions to stay below 1.5°C until 2100 which are about 10 more years at the current rate. (However, the methane deposits in the permafrost are thawing far faster than the models said, so we might have a lot less.) We should be rioting in the streets, really. The kids have the right idea.