Plan B: Probably Unnecessary but Worth a Look

This is an interesting video and worth a look. My problems with it are:
1) the lifetime of CO2 in the atmosphere is doubtful as described. Numbers prior to the hysteria generated by global alarmists were about seven years.
2) the idea that there can be too much CO2 (at least at the levels we can generate, currently about 3.6% of the overall CO2 produced by nature) and that it has a cumulative effect of any particular consequence is doubtful. It's a logarithmic function and most of the effect possible has already been achieved. Each doubling may produce 1 degree centigrade and the earth has been much warmer and had much more CO2 in the past without it endangering life.
3) the idea of pumping particulates into the sky to cause global cooling is just expensive and not too troubling as long as the stuff you put up there doesn't stay too long and cause so much global cooling that we have a problem.

So this is an interesting idea and might be worth exploring just in the extreme case that any of this nonsense has anything behind it but puffery.