Below you will find key charts, graphs, and info-graphics that help to explain humanity's reliance on extraneous energy sources to maintain modern industrial societies. Fossil fuels (oil, gas, and coal) remain the primary sources of energy for all of humanity. They account for 95+% of all extraneous energy, i.e. energy expelled by non-humans to perform work on behalf of humans. Although some assert this figure to be more like 85%, that figure is derived from including biomass (burning wood/trees), I do not consider that to be reusable (in a meaningful way) considering the fact that all the biomass that exists in the USA could only energize the country for one to two years. i.e. if the USA burned all plants that exist in the country, it would only power the country for one to two years. Although it is technically "renewable," the time it takes to renew is 50 - 100 years. Hence, it is possible to power the entire U.S. system with biomass but it will only be sufficient 2% of the time. For example, the U.S. could power itself with biomass for two years and then need to revert to manual (human slave) power for ninety eight years.