165k views
18 votes
Monitoring levels of which two gases would help determine the human

impact on air quality?
A. Methane
I B. Water vapor
I C. Carbon dioxide
✓ D. Oxygen

User Emerald
by
5.4k points

2 Answers

5 votes
D.) Oxygen

i hope this helped...
User Frodopwns
by
5.7k points
3 votes

Answer:

oxygen is the answer......

User TehBoyan
by
5.6k points