I've got a friend who's currently travelling around the US visiting collaborators, attending conferences, giving talks, and building a giant carbon footprint. Considering our planet is on the verge of a climate apocalypse, a part of me is genuinely annoyed at him - there is no way the Earth can accommodate 8 billion people who lives like he does, which burdens the rest of us have to compensate for his lifestyle.
On the other hand, these things are kind of integral to the academic experience, and they are very helpful (necessary?) to getting a job/funding. In fact, other academics might very well expect you to do these things, e.g. Shinichi Mochizuki was criticized for not visiting other institutions to convince the world his proof of the abc conjecture is correct.
Is there a way to be an academic without also helping push our planet over the climate cliff?