> A single plane ride from NYC to LA emits about 20% of the greenhouse gases your vehicle does each YEAR. I can't immediately tell from the source NYT cites, b

> A single plane ride from NYC to LA emits about 20% of the greenhouse gases your vehicle does each YEAR. I can't immediately tell from the source NYT cites, but is that 20% of one person's vehicle emission, or 20% of the aggregate vehicle emission of all passengers? If it's the former, that might not be a great way to frame the problem since cross-country flights typically have hundreds of passengers.