c. Water, housing, clothing, and medicine--the four main ___________--are produced from forest products.
d. Forests are the source of many streams and rivers, because they ___________.
e. Thailand sends many wood products abroad for sale. The ________ ________ such as teak requires a properly managed replanting programme.
Part Six : The "greenhouse" effect is a serious environmental problem. It is often called "global warming." After reading the passage about the "greenhouse" effect, answer the multipe-choice questions which follow.
1. The "green house" effect is caused by teh increase of __________ in the atmosphere.
a. oxygen
b. carbon dioxide
c. acetate
2. The ____________ use of oil buring engines and the rapid __________ of the worlds' forests are the main reasons for the green house effect.
a. controlled, destruction
b. uncontrolled, destruction
c. reasonable, development
3. The gradual warming of the ocean has caused the loss of several important sea _________.
a. animals
b. plants
c. vegetables
4. One way to stop the "green house" effect is to __________, that is, use forest properly and wisely.
a. destroy
b. conserve
c. slash