The ocean phytoplankton technology sounds like it has the potential to screw the planet up worse than the climate change issues it's trying to solve.

Massive, self-replicating system of genetically engineered bacteria? I'm certainly no marine biologist, but I'm pretty sure phytoplankton are a super important part of the world's ecosystem. Suddenly massively increasing the number of them that exist in the open ocean seems like it would wreak havoc on the world's ecological balance.