Greenhouse Gases

 Test Yourself

See how many answers you can get right with this Greenhouse Gases quiz:

1. The main greenhouse gases include:


2. When sunlight strikes the Earth's surface, some of it is reflected back towards space as:


3. Concentrations of carbon dioxide in the atmosphere are naturally regulated by numerous processes collectively known as:


4. CFCs have been responsible for depleting the:


5. During the past 20 years, how much of human-made carbon dioxide emissions were from burning fossil fuels?




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