Answer: b) 1,200 pounds of CO2 would be emitted.
Assuming his Prius gets 50 miles per gallon on the trip, and the distance between LA and New York is 3,000 miles, he would consume roughly 60 gallons of gasoline. WHILE A gallon of gasoline weighs 6.3 pounds, IT produces 20 pounds of CO2 WHEN BURNED! WHY? Most of the weight IN THE CARBON DIOXIDE doesn't come from the gas, but FROM oxygen in the air."