When Does a New Fuel-Efficient Car Lower Greenhouse Gas Emissions?
Years needed to pay back the CO2 emissions from scrapping an 18 mpg clunker and buying a new car as a function of the new car’s mpg rating. The arrows show the minimum mpg’s required for both a new car and a new light truck under the Feinstein bill. Assumptions: embedded CO2 in the manufacture of a new car is 6.7 tons. Car is driven 13,000 miles per year.
