when you break up carbon emissions by industry, you get a lot of buckets that make up <10% individually. you can't ignore all of them because they're too small to be worth optimizing.

also, instead of focusing on optimizing emissions per mile, why not ask how many flights are actually necessary? at the same time that we invest in electric vehicles, cleaner power generation, and public transit, we might also ask if it's really necessary to vacation overseas. we might ask if video chat could replace flying to meet the board or a client.