Presentation on theme: "A Fossil fuel Colin Martin and Devin Nunnari. 286 million years ago dead plants fell to the bottom of swamps. More water and dirt wash in halting."— Presentation transcript:
286 million years ago dead plants fell to the bottom of swamps. More water and dirt wash in halting decay process. The pressure builds up and forms coal. Coal is a fossil fuel.
In 1275 Marco Polo saw the Chinese using coal. Hopi Indians used coal to bake pottery. Discovered coal in 1600s. Humphrey Davy made the safety lamp in 1815. Coal became popular in the 1800s.
Coal is mined in every continent except Antarctica. The USA and China mine the most coal in the world. The USA has the worlds largest coal reserve. Coal is mined in 33 states. Surface mining extracts about 70% of coal. Surface mining can only be used when 200 feet underground.
More than half of the mines are near the surface. Power plants are installing machines called scrubbers because of so many accidents. Coal produces a lot of power when burned.
Mines produce an enormous pile of waste. Coal can form acid rain. When coal is inhaled dust clogs lungs/airways.
Coal is a nonrenewable energy source, it takes millions of years to form. We will have coal last about 260 Years.
Slurry combined with calcium oxide makes hydrogen gas. A steam powered super car uses coal for an engine.