4 ms·
Good ongoing thread here regarding the environmental impact of dams: https://news.ycombinator.com/item?id=27348870 https://news.ycombinator.com/item?id=27348870
by crygin 5y ago
Good ongoing thread here regarding the environmental impact of dams: https://news.ycombinator.com/item?id=27348870 https://news.ycombinator.com/item?id=27348870
- setum 5y agowater mills are not dams
- Aerroon 5y agoThe point isn't about dams. The point is that what generates electricity in a dam is water flowing downhill. However, we don't have to do any work ourselves to get the water back uphill. Effectively it's a "perpetuum mobile" from our practical perspective. It is, in essence, a free lunch. The water evaporates due to the sun and rains down in the hills whether we take advantage of it or not.