Is it always better to drive than fly in terms of global warming? Well, it depends on several factors, such as the car’s mpg, the number of passengers, tire pressure and the driver’s driving habit.

An airplane generates much of its emissions during takeoff and landing. So there is a higher CO2 output per passenger-mile during a short-distance flight than a long-distance flight.

Short-distance airplanes usually use less efficient engines. They experience more drag due to lower altitude flying.

Long-distance flight, on the other hand,  may have less average CO2 emission per person than a single-occupant vehicle. So for long trips for a single person, it is better to fly than to drive.

Also, try to avoid red-eye flights. There is evidence that night flights have a bigger impact on global warming.

Source: www.MotherEarthNews.com