Solar energy was, and is, the solution to our problems. But it is a lot better and stronger in space.
Solar energy would be a good solution to our energy problems, if it were available twenty-four hours per day and were never cut off by clouds. We should not dismiss it entirely, but it is very difficult to obtain at Earth's surface when we need it. To summarize, our hopes for improvement of the standard of living in our own country, and for the spread of wealth to underdeveloped nations, depend on our finding a cheap, inexhaustible, universally available energy source. If we continue to care about the environment in which we live, that energy source should be pollution-free and should be obtainable without stripping Earth.