Related: Salmon swim freely in Klamath River for first time in more than 100 years With California’s Klamath Dam removal project finally completed, new before and after photos show the dramatic ...

Sunset Dam, Kruger National Park, South Africa, is heavily infested with water lettuce (Pistia stratiotes). The population was effectively eliminated by a combination of biological and chemical ...

Incredible before and after pictures show a vast improvement in vegetation growth along a dam after the pigs' removal. A ...