Suppose that every car on the road burned up about two gallons of gas a day. For each gallon of gas burned, one pound of carbon dioxide is released into Earth's atmosphere. If 144 million cars are used in the United States each day, how many pounds of carbon dioxide are released into the air each week?

about 2 billion pounds

288 million pounds

144 million pounds

about 10 million pounds

There are 144 miliion cars, and each car on the road burned up about two gallons of gas a day. So 144 million cars burned up about 288 million gallons of gas each day.

And for one gallon, 1 pound of carbon dioxide is released into Earth's atmosphere. So for 288 million gallons, 288 million pounds of carbon dioxide is released each day.

Therefore in a week, 288*7 million pounds of carbon dioxide release, that is approx 2 billion pounds.

So the correct option is the first option.

about 2 billion pounds