4.2 What is Clean Coal? Coal is Solar Energy Stored by Plants Millions of Years Ago. We now have the Technology to “Clean” It Before we Burn It.

Unless large new petroleum reserves are discovered, a greater share of our future needs will have to come from coal and from alternative energy sources such as nuclear, geothermal, solar, wind, tidal and hydroelectric power. Two fossil fuel alternatives, oil sands and oil shale, are sometimes mentioned as promising sources of liquid fuels.
Along with oil and natural gas, coal is commonly called a fossil fuel. Such a designation is appropriate because each time we burn coal we are using energy from the Sun that was stored by plants many millions of years ago. We are indeed burning a fossil.


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