Carbohydrates changed into sugar
proteins broken down to amino acids
fats converted to fatty acids
nutrients carried to cells
Answer:
Smog.
Explanation:
Hello there!
Here's the definition you were looking for:
smog
<em>noun</em>
1. fog or haze combined with smoke and other atmospheric pollutants.
"exhaust emissions are mainly responsible for the smog"
:)
That system is called the immune system