Seat utilization is a big factor here, but let's take the worst case for a car vs. the best case for a helicopter. Assume that the helicopter can make 3 trips

Seat utilization is a big factor here, but let's take the worst case for a car vs. the best case for a helicopter. Assume that the helicopter can make 3 trips per hour (8 minutes flight time, plus 12 minutes turnover). 950 / 3 = 316 lbs of C02 per flight. It looks like the Bell 430 configuration they have has 6 passenger seats, so 52.7 lbs of C02 per passenger. Even if the taxi has only one passenger and takes 1.5 hours to reach JFK in moderate traffic, that rider will only be generating 33 lbs of C02 (37% less C02 than a helicopter in a best-case scenario for the helicopter). Buses do produce more CO2 than cars, but are generally 6-8 times more efficient on a passenger-mile basis.