Answer:
heavy traffic producing large amounts of exhaust
Explanation:
the exhaust is putting the smoke into our atmosphere or in other words it is polluting the air
Being in a good positive energy balance helps with many things including recovering from the flu, repairing from an old injury or broken bone, growing while you're a child or even while you're pregnant. Having positive energy can also make a difference on your metabolism, hormones and overall mood.
You should stretch first because it get the blood flowing through your body and it helps with being soar its just the best way to start
a better life-style and healthy body.