Sustainable fuel sources don't destroy the environment, degrade society, or endanger the future while meeting our energy needs. Fossil fuels do.

Fossil fuels are hard to quit. Although they are non-renewable, they are abundant and have an energy density that renewable sources cannot hope to match. However, their drawbacks are quite literally damaging our present and destroying our future. They are not renewable. But more importantly, they don't meet any other sustainability requirements.

Unfortunately, confusion about how fossil fuels fit into the conversation about "renewable" and "sustainable" energy is partially to blame for the widespread stubbornness of their use as an energy source. This article seeks to clarify how they fit in.