Answer:
d. sewage treatment and nitrous oxide
Explanation:
<span>Error bars within treatments illustrate confidence intervals, standard errors, standard deviations or other quantities. However, different types of error bars exist, so figure legends must be sure to distinguish which error bar is being represented. </span>
Dominant m8 hope this hleps
Answer:
My guess is A
Explanation:
I guess it's a but dont choose it it might not be right