Rivers make waterfalls. Well water is underground
Water.
There is a lot of water, so there will naturally be more waterfalls.
wells, spings, rivers, waterfalls etc.
waterfalls can generate hydro-electricity by the force of the water
near water
Waterfalls are formed when water flows over resistant rock. And yes they do.
Potamophobia - Is the fear of running water. There isn't one specifically for waterfalls.
Because water is blue.
Oxygen
No. Water is nonliving, so no.
The highest waterfalls in continental US are to be found in the Yosemite National Park - see below in the Sources and Related Links section for more information.