Wasn't this attributed pretty much directly to cleaning of the shipping lanes? With more direct sunlight on the ocean, we are getting warmer oceans. With warmer oceans, we get everything that goes along with that.

I didn't see it mentioned in the article, though I did do a very brief read through. And it has been a while since I looked at the shipping lanes thing.

I hasten to add this is not to claim we should not have cleaned the shipping lanes. I don't know enough to say on that front. My gut would be that it was still the correct move.