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Which of the following methods of improving air quality does not require advanced technology?
a.
exhaust scrubbing
b.
conservation
c.
using renewable energy sources
d.
driving fuel-efficient cars
Please select the best answer from the choices provided
A
B
C
D
Answers: 1
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What is thought to have caused the mass extinction at the end of the cretaceous period?
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Which of the following methods of improving air quality does not require advanced technology?
a.
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