Which of the following is not a negative aspect associated with hydroelectric power? 1. dams fish swim upstream to spawn.2. the dams will reduce the downstream flow of river.3. the dams will destroy ecosystems when built.4. the dams will flood upstream land.15 points will mark as branliest.

I would go with number one, because that's the only option that isn't negative.

It's the first option, because that's the only option that is not negative.

in 1948, swiss engineer/amateur mountaineer george de mestral went hiking in the woods with his dog. when they arrived back home, george found burrs stuck to his dog’s fur. this inspired him to create velcro.

explanation: