Which is a source of land pollution heavy traffic

t's Fertilizer running off from a large agricultural farm

Explanation:

heavy traffic producing large amounts of exhaust mold growing on an indoor windowsill people smoking tobacco outside a building fertilizer running off from a large agricultural farm

the more fit you are, the faster the recovery. your heart rate drops most sharply in the first minute after you stop exercising; it should then fall about 20 beats a minute—a drop of less than 12 beats a minute is considered abnormal. this “recovery heart rate” is measured as part of an exercise stress test.