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Now that you have learned how the greenhouse effect impacts Earth's radiation balance, fill in the table below. To check your answers, click on the boxes and the correct answer will be highlighted in green.

Increased Greenhouse Effect Decreased Greenhouse Effect
What is the effect on surface temperature change?
Increased Surface Temperature
Increased Surface Temperature
Increased Surface Temperature
Increased Surface Temperature
Decreased Surface Temperature
Decreased Surface Temperature
Decreased Surface Temperature
Decreased Surface Temperature

Gases produced by human activities can increase the natural greenhouse effect. This is often called the enhanced greenhouse effect, a concept we will explore in later lessons.

Congratulations! You have now completed Lesson 4. Move on to Lesson 5 to learn more about climate issues around the world.