@MarkRuffalo
I have so many questions about that article.
"But for some projects, so much methane β a potent greenhouse gas β is released from decaying submerged plant matter that they can emit as much carbon per unit energy as do fossil-fuel power plants."
Yes, methane is a powerful greenhouse gas, but short-lived in the atmosphere. It breaks down relatively quickly.
Sunlight powers plant growth in the water, filtering pollutants. What are the effects of reducing plants?