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Question 22: A. for cooling things down by the use of green roofs and lighter colored materials B. they must implement the construction of g...

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Question 22:
A. for cooling things down by the use of green roofs and lighter colored materials
B. they must implement the construction of green roofs and use light materials
C. cool things down by using green roofs and lighter colored materials
D. to cool things down by using green roofs and lighter colored materials

 

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