Multiple choice

The amount of carbon dioxide in the atmosphere has increased in recent years. Environmentalists suggest this change is a direct result of

  1. overcutting of forests and the increased use of fossil fuels

  2. dumping of inorganic material into lakes and rivers

  3. improper storage of solid and nuclear waste

  4. use of herbicides and toxic substances such as asbestos and DDT
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The amount of carbon dioxide in the atmosphere has increased in recent years. Environmentalists suggest this change is a direct result of the overcutting of forests and the increased use of fossil fuels. Deforestation and the use of fossil fuels are both suspected of increasing the amount of carbon dioxide in the atmosphere. This is of worldwide concern because of its potential effects on the environment, such as global warming due to the weakening of the ozone layer which protects the earth from harmful solar radiation. 

Keep practicing — related questions