10. Remember - your ____________ ___________.

Part 4 Multiple Choice

9. And, ___________, talk ____________ your family and friends ____________ global warming and tell them what you have learned.

9. Sometimes I feel that ____________ can’t have any ____________ ____________ ____________huge ___________ problems.

8. There are some very different ____________ among scientists ____________ ____________ ____________.

7. They also believe ____________ ____________ the burning of more and more fossil fuels that is ____________ ____________ this increase in carbon dioxide.

6. It was ____________ ____________ ____________ Charles Keeling ____________ made ____________ ____________ ____________ the amount of carbon dioxide in the atmosphere from 1957 to 1997.

5. The ____________ ____________ of carbon dioxide ____________ that more heat energy is trapped in the atmosphere ____________ the ____________ ____________ ____________ ___________.

4. ____________ the greenhouse effect, the earth ____________ ____________ about thirty-three degrees Celsius____________ ____________ ____________ ____________ ____________.

3. There is ____________ ____________ that the earth is becoming warming but there is ____________ ____________ ____________ whether it is ____________ ____________ ____________has caused this global warming or whether it is ____________ ____________ ____________ ____________.

2. It is a rapid increase ____________　____________　____________　____________　____________.