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A little more than 400 years ago, people in northern Europe began to burn coal instead of wood for heat. That's because:
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When you ride in a car, watch your favorite television show, or take a hot shower, you're most likely using fossil fuels. Fossil fuels are fuels from Earth like coal, oil, and natural gas. Burning fossil fuel is bad news for Earth's climate. It releases carbon dioxide and other greenhouse gases into the atmosphere. These gases absorb and keep heat in the atmosphere, causing temperatures around the world to warm.
the forests of the region were shrinking
coal produces more energy than wood
both of these
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Correct!
Coal was also abundant in the region. By the 1700s, coal was driving the steam engines that powered factories, trains, steamboats, and ships.
One metric ton of coal generates enough electricity to power an average U.S. household for two months. It also produces about:
0.5 metric tons of carbon dioxide
1 metric tons of carbon dioxide
2.5 metric tons of carbon dioxide
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Correct!
When carbon burns, it combines with oxygen in the atmosphere to form carbon dioxide. Carbon dioxide is about 2.5 times heavier than the original carbon atom from coal.
Cars, trucks, and planes are powered by oil in the form of gasoline or diesel fuel. The more fuel a car uses:
the faster the car goes
the more carbon dioxide the car absorbs
the more carbon dioxide the car releases
Are you right?
Correct!
That's why cars that are more fuel-efficient, like smaller cars and hybrids that run on gas and electricity, put fewer greenhouse gases into the atmosphere. They contribute less to climate change.
The fossil fuel that produces the least amount of carbon dioxide when burned is:
coal
natural gas
oil
Are you right?
Correct!
Natural gas produces about 45 percent less carbon dioxide than coal to produce the same amount of energy. Currently, natural gas provides about a quarter of the world's energy supply.
Fossil fuels are the remains of ancient plants and animals.
Fact
or
Fiction
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Fact
Fossil fuels are made of carbon from these ancient organisms. When burned, this carbon is quickly released into the atmosphere. It combines with oxygen to form carbon dioxide.
People who use electricity produced by burning coal live near coal mines.
Fact
or
Fiction
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Fiction
Power plants that rely on coal are close to coal mines. But the electricity can be delivered hundreds of miles by high-voltage power lines.
Definition: fuel formed from remains of ancient plants and animals; coal, natural gas, oil
Found: within Earth's crust
Uses: provide energy for power plants, heat buildings, produce petroleum (gasoline) for cars, trucks, and airplanes
Emissions: carbon dioxide when burned
Cool Fact: The average car is driven 12,000 miles a year, and produces about 5.5 metric tons of carbon dioxide.
Image credits: courtesy of istockphoto.com.