Ahmad is experiencing excessive sadness, is tired all the time, has no interest in working and visiting with friends, feels hopeless, and has lost weight. ahmad is most likely suffering from

dude i stopped reading after the first 7 words but hey you seem real smart thats awesome have a great day

explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.

the wetland preservation movement began in the u.s. in earnest with the clean water act (cwa) of 1972. although not specifically written to protect wetlands, the cwa is comprised of a series of regulations designed to prevent pollutants from contaminating u.s. waters.

d. changes in climate and historical records

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