Comment Why the *real* answer is "humans" (Score 1) 1007
Coal/Oil/Natural Gas - they will be depleted
Wind - there will be no atmosphere
Sun - the garbage orbiting around the Earth will prevent solar light from reaching us
Fission, Fusion - all technology will be gone, due to whatever will cause the atmosphere to leave us in the first place
Geothermal - the Earth's core will be cold
Hydroelectric - no atmosphere, no water
Hence, IF humans will still exist, THAT will be the real energy source :)
Wind - there will be no atmosphere
Sun - the garbage orbiting around the Earth will prevent solar light from reaching us
Fission, Fusion - all technology will be gone, due to whatever will cause the atmosphere to leave us in the first place
Geothermal - the Earth's core will be cold
Hydroelectric - no atmosphere, no water
Hence, IF humans will still exist, THAT will be the real energy source