Coal, oil and natural gas are Americas most "readily" usable and presently abundant sources of energy.
Ground Water!
solar energy
Hydrogen (H)
The most abundant source would be in glacial form as frozen water, although the most abundant and accessible source is groundwater.
must be taking Cataneso's final ;) Fossil fuels is #1 and nuclear is #2
Coal is the most abundant in the USA
The sun
Solar.
Geothermal
fat
Ground Water!
solar energy
Solar Energy
hydro electric power
Hydrogen (H)
yea it is
the most abundant nonrenewable source of energy is fossil fuel which had been created on our earth millions of years ago.