One of the most common types of bacteria-related diarrhea in the united states, resulting primarily from the ingestion of contaminated water, raw milk, and raw or undercooked meats, is caused by

hemorrhagic colitis -caused by E.coli, most common in children, severe abdominal cramps, vomiting, diarrhea, and a short-lived fever followed by watery, bloody diarrhea. Sources of E.coli; beef, unpasteurized milk, unpasteurized apple juice or cider, raw sprouts, dry cured salami, fresh produce, yogurt, sandwiches, water.

as resources become scarce because of population growth, the growth decreases after few years due to lack of resources and food.

the answer would be knowledge about cars!