Fossil fuels, suck as burning coal or using oil
Niagara Falls
Niagara Falls, NY/Canada.
Coal.
That depends a lot on what you mean by "this source".
In the US, nuclear power provides about 20% of the total electricity generation, making it the largest source of low-carbon electricity. There are 93 commercial nuclear reactors operating in 28 states.
fossel fule
The most important source of political power for the US government is the people.
some 50 coal burning power plants.
crude oil
oxygen(O2)
Coal is used as a source of power in all 50 US states. It is the main source of electric power in the US acconting for ~43%.
Niagra Falls _______________________ The biggest source of hydroelectric power in the northeast US is Quebec Hydroelectric. Most is imported from Canada.