How can you approximate the number of calories required to keep you in energy balance?

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.

your body is trying to warm itself up. or more precisely, sensors in your skin send messages to your brain to generate heat to your body.