When released into the atmosphere, which has the most effect on Earth's temperature? *
1 point
How much carbon dioxide does the average American emit into the atmosphere per year? *
1 point
In the 10,000 years before the Industrial Revolution in 1751, carbon dioxide levels rose less than 6 percent. Since then, they've risen by: *
1 point
Humans produce more than 36 billion tons of carbon dioxide per year. Where does the majority of it end up? *
1 point
If humans stopped emitting carbon dioxide tomorrow, what would happen to global temperatures? *
1 point
Which does more to reduce your carbon emissions: recycling in your household or switching to renewable energy? *
1 point
If every household in the U.S. started composting, the amount of reduced carbon emissions would be the equivalent of taking how many cars off the road? *
1 point
Which energy option would reduce carbon emissions the most? *