The author is VERY much a fan of phytoplankton fertilization. He does not cite many other people talking about it, but he is very very very convinced.

Maybe he's right, but the tone and the "once you have a hammer, everything look like deep ocean fertilization" bit does not help.

> It’s not true, though. We have quite a precise understanding of what happens

Ah, man, the hubris to see a long history of human interventions with unexpected knock on consequences, and think, “but this time we know.” It’s comical, even. We’re talking about an intervention large enough to reverse decades of climate change, of course there will be unintended consequences.

In the end, however, we will likely have to do something, and this might be the solution with the best-mapped consequences (and thus fewest unforeseen consequences).