Less than 0.0000001% of the Sun's energy output ever reaches the limits of our atmosphere, simply due to our size and distance away from the Sun. Long-term, en

Less than 0.0000001% of the Sun's energy output ever reaches the limits of our atmosphere, simply due to our size and distance away from the Sun. Long-term, energy is not the key absolute problem, but actually being able to get the technology, materials, short-term energy, and political will together to be able to harness the mind-boggling amounts of space and energy that's out there.