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How Coal Stoves Work
home.howstuffworks.com/home-improvement/heating-and-cooling/coal-stoves.htm
Coal stoves are very efficient when they are maintained properly. Learn more about how coal stoves work at HowStuffWorks.
How Carbon Tax Works
science.howstuffworks.com/environmental/green-science/carbon-tax.htm
A carbon tax is one of two market-based options that focus on lowering harmful emissions. Learn about the carbon tax and how a carbon tax can lower emissions.
What Is Asphalt Made Of?
science.howstuffworks.com/asphalt.htm
If you think asphalt is what hot tar roads are made of, you'd be wrong. Asphalt is only one ingredient in the recipe that makes up our roads. And it has a very long, very interesting history.
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