Climate 101: Deforestation | National Geographic

What percentage of global greenhouse gas emissions are caused by forestry and agriculture?

• 10%

• 24%

• 50%

• 75%

How does deforestation contribute to global warming?

• Trees release stored carbon when cut down, and fewer trees absorb less carbon dioxide.

• Trees absorb more carbon dioxide when cut down, and release less oxygen.

• Deforestation leads to more rainfall, which cools the planet.

• Deforestation increases the number of animals, which produce more methane.

Approximately what percentage of land plants and animals depend on forests for their homes?

• Over 20%

• Over 50%

• Over 80%

• Over 95%

What is the primary reason for deforestation?

• Logging

• Urban sprawl

• Agriculture

• Forest fires