Where do people in the five boroughs (nyc etc) get their tab water? provide reasearch as well.
40 points answer correctly!

Before it hits your tap, unfiltered water from the Catskills winds its way through 6,000 miles of pipes aqueducts and tunnels.

Most of New York City's water -- 90 percent -- comes from the Kensico Reservoir. It holds 30 billion gallons and then travels to the ultra violet treatment facility in Westchester County, where 12,000 bulbs treat 1 billion gallons of water a day.

Hope this helps

the correct answer is:

a population changes in response to a change in the environment.