This document discusses fossil fuels and the need for their sustainable management and conservation. It defines fuels as substances that provide energy through chemical changes and lists petroleum and coal as important fossil fuels. Fossil fuels are non-renewable and our most essential energy source, so we must manage them judiciously. The document recommends converting fossil fuels to more efficient forms like compressed natural gas, reducing electricity consumption to use less coal, recycling and reusing products to limit emissions, and increasing renewable energy sources like wind and solar which produce little pollution. Currently 85% of global energy comes from fossil fuels but only 2% from renewable sources, so conserving fossil fuels is essential to sustain the Earth's energy needs.
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