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podryga [215]
3 years ago
8

Indoor air pollution has increased as improvements have been made in

Biology
2 answers:
Snezhnost [94]3 years ago
8 0

Answer:

E

Explanation:

kumpel [21]3 years ago
4 0

Answer:

A) heating and air conditioning systems

Explanation:

I say A because the rest of the choice are promoting good ways to decrease global warming, and if you don't have as many harmful gases in the air you wont have them in your building.

e2021

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