Comment environmental damage from dams (Score 1) 360
Dam's are great for humans in the short run, but as we have seen with nearly every attempt we have made to shape nature to our will it causes long term damage. Dams restructure entire ecosystems. They (obviously) change water levels in adjoining rivers and streams will leads to kill offs of entire ecosystems. They mess up spawning patterns of various fish and even the ones that add fish ladders still screw it up because there is a severe temperature gradient between the two sides of a dam that upsets egg viability. There are several more ways and I am sure you can find lists on the web from the Army Corps of engineers, etc. that are less biased than some of the more radical green groups, but in general dams are not good for the environment.