US Department of Energy
U.s. Department of Energy: Coal: Our Most Abundant Fuel
The U.S. has enough coal to last for the next 200-300 years. So why are we not using more of it? This article describes the different types or "ranks" of coal, the history, and the problems with burning coal for energy.
The Franklin Institute
As the Drill Bit Turns
Is the world running out of gas? Teach your students how their lives impact the depletion of non-renewable resources, specifically oil, and how the depletion of those resources will effect the future.