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1. Wind energy can be used to pump water or generate electricity, but requires extensive areal coverage to producing enough energy needed for running the whole factory.

A. or B. requires C. producing D. for

2. Hydrogen can burned as a fuel, typically in a vehicle, with only water as the combustion product.

A. burned B. in C. only D. combustion

3. There are several promised methods to produce hydrogen, such as sun power, that may change the energy system in some ways.

A. promised B. produce C. sun D. systems

4. To save water, take shorter showers to reduce water use. This will raise your water and heating bills too.

A. shorter B. reduce C. raise D. too

5. When it comes to climatic change there are quite a lot of debate over how we can tackle this problem.

A. it B. climatic C. quite D. debate

6. Much of the solar energy that reaches rural areas is consume by evaporation of water from vegetation and soil.

A. Much B. that C. consume D. evaporation

7. Economists have recently show that there exists a large productivity gain due to locating in dense agglomerations.

A. Economists B. show C. productivity D. agglomerations

8. It is thus possible that agent locate in cities in order to benefit from these agglomeration affects.

A. possible B. agent C. benefit D. affects

9. Impacts also include reducing soil moisture and a reduce in reabsorption of carbon dioxide emissions.

A. Impacts B. soil moisture C. reduce D. reabsorption of

10. When rain occurs in these large cities, the rain filters down the pollutants such as CO2 and another green house gases in the air onto the ground below.

A. filters down B. pollutants C. another D. onto