You should read the examples of how cane toads were intentionally introduced into Austria to fix a problem with beetles in sugar cane. Or how kudzu was introduced from China into the US to help stop soil erosion. The problems were all know, the solutions all well vetted, and enough arrogance to go twice around the planet. The biggest problem with most of the climate engineering is that once it is started it will be irreversible and out of control. Just like kudzu and cane toads.