A group of humans, called the Dams, became sick of political feuds involving water. They were completely tired of the wasteful wars the countries fought for water resources. These wars had created a lot of damn dams which displaced local populace, affected the downstream flow, destroyed ecology, and whatnot.
These tired Agents of Damnation decided to tackle the root of the problem: they came to the conclusion that they needed to un-dam all the damn artificial dams on the planet. They also needed to make massive plantations of quick growing trees and shrubs across vast swathes of land downstream on all Damm(n)ed rivers.
Now 100 years have passed since operation ''Damn the Dams'' has been completed. All the river dams across the world are broken open. How would the local weather and ecology be affected? Will it really help restore ecological balance or will it be just a damn failure?