B3 Humans & Their Environment

Question 1

Give two reasons why deforestation increases the amount of carbon dioxide in the atmosphere

Answer 1

Carbon dioxide is a greenhouse gas. It absorbs heat energy that is radiated from the Earth’s surface and prevents it from escaping into space. … But human activities are increasing the amount of carbon dioxide in the atmosphere. This increases the greenhouse effect and leads to global warming.

Question 2

Give some effects of global warming

Answer 2

Increase in average temperatures and temperature extremes
Ice melt
Extreme weather events