How does acid rain affect lakes and ponds?
In some parts of the world, the lakes are in limestone, which neutralizes acid from rain. But in other areas, including parts of the northeastern United States and eastern Canada, the lakes are in granite, which does not weaken the acid. While the acid in such lakes is relatively weak, it is enough to kill fish, salamanders, frogs and many bacteria in lakes. Tiny water plants might also die. This is why a the water in a lake that’s acidic might look very pure while a healthy lake might have cloudy water because of the natural plant life thriving in it. The U.S. EPA’s Effects of acid rain page has more information.
