
You know a hybrid pollutes less than a gasoline engine, but do you know the difference between flex-fuels and biofuels? Electric cars and hybrids? Get your motor running with our green cars quiz.

by Matthew McDermottWhat is 350ppm?Though they trail other greenhouse gases in terms of actual global warming effect, on a per unit basis the EPA says Chlorofluorocarbons are up to 23,900 times more powerful than carbon dioxide in trapping heat in the atmosphere -- and they also stay in the atmosphere indefinitely.

Think you know how to curb your carbon? Take this quiz and find out.

Take this quiz to find out if you are a wind power wiz.

Do you know your options when it comes to non-car transport? How much gas can you actually save? We've got the answers and lots more questions about transport in this quiz.

How Much CO2 Are You Emitting?

Do you know your solar stuff?

How much do you know about taking gadgets to a greener level?

How Well Do You Know Renewable Energy? Take this quiz to find out.

Measure the footprint of your transportation with this quiz.

Cycling is green. Knowing how to do it well is greener.

Test out how much you know about e-waste issues.

You know a hybrid pollutes less than a gasoline engine, but do you know the difference between flex-fuels and biofuels? Electric cars and hybrids? Get your motor running with our green cars quiz.

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