Our friends at Kite & Key have made an excellent six-and-a-half-minute video explainer on the realities of America’s energy future. Renewable energy will be part of the mix, but there are powerful physical and economic constraints on how far it can be used to meet US energy needs.

Did you know that with natural gas, you get about 30 times more energy out of it than it took to produce it and bring it to market? With solar power, the equivalent is only about 3.5 times.

Learn this and other fascinating facts from the video below: