1. What would gasoline give out if it were burned perfectly?
A) Nitrogen oxides.
B) Carbon monoxide.
C) Unburned hydrocarbons.
D) Carbon dioxide and water.
2. What will be the most possible consequence of gas emission?
A) Raising sea level.
B) Flooding coastal cities.
C) Changing global climate.
D) Endangering ozone level.
3. Hydrogen is a completely clean technology in that ________.
A) it eliminates much of pollution
B) it burns perfectly in all fuel cell
C) it imposes no environmental dangers
D) it only produces carbon dioxide and water
4. How can we produce more hydrogen in our homes?
A) By using electricity and water
B) By creating water in a fuel cell.
C) By converting water into oxygen.
D) By combining hydrogen with water.
5. One can obtain hydrogen from oil and natural gas by ________.
A) a fuel cell
B) a filter box
C) a filter pump
D) a fuel processer
6. Almost all the car companies plan to obtain the hydrogen for the fuel cells from gasoline because ________.
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