What's better for environment, driving or flight?

Even there SUV's most competitive with gas-globing, lumbering and malleable infernal aircraft. if it carries four or five passengers. So in an efficient bus road, two people generate fewer emissions per person compared to the average aircraft, so if the time motor vehicle does not have a purpose then greenery may be preferred.  pic-source: https://pixabay.com/en/mountain-jeep-suv-cherokee-car-3784995 This additional weight of 90 pounds only makes the fuel economy less than 1%. But the largest wild card of all is the number of passengers in automobiles. Its wish there was a simple answer but its question contains a few too many risky factors. It Aircraft efficiency differs as do the conditions on different routes.  pic-source: https://pixabay.com/en/aircraft-vacations-sun-tourism-1362586 This domestic airliner can get anywhere from 50 to 80 miles per gallon per passenger, it's with an industry average of about 55 miles per gallon of fuel per passenger. Its Motor vehicle variations are much greater such as SUVs that average to hybrids that get almost Jet fuel also emits somewhat more carbon dioxide per gallon. It global warming impacts are greater than from ground-level emissions as previously noted here.