Work in groups. Carry out a survey to find out how people in your area are reducing the negative impact of their daily activities on the environment and trying to limit global warming.

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
Human is the direct factor that causes and makes this phenomenon more and more serious. The reason is because the increase in CO2 content is mainly due to human activities, such as fuel burning, the reduction in agricultural land use, especially after the industrial revolution.
Helping limited global warming, we should:
1.
Walk, bike, carpool or take mass transit more often. You'll save one pound of carbon dioxide for every mile you don't drive!
2. Avoid products with a lot of
You can save 1,200 pounds of carbon dioxide if you reduce your garbage by 10 percent.
3.
A single tree will absorb one ton of carbon dioxide over its lifetime.
4.
Simply turning off your television, DVD player, stereo, and computer, when you're not using them, will save you thousands of pounds of carbon dioxide a year.