Earlier quoted context omitted.
The best reason for exactly these individual changes you are describing is that - and this is a really funny and convenient coincidence - you are benefiting of them first and foremost yourself! > - Stop flying to conferences. Go to a local meetup. It's fun. And cheaper. If you really need to get out of town, take a train. No unnecessary hassle and stress from flying to far away places or getting stuck in traffic jams…
Chicken, fish, and turkey are some of the healthiest delivery mechanisms for protein on the planet. They can be grown sustainably, as well, so again, veganism isn't required. At the supermarket, just get the expensive chicken breasts - I'm guessing the vast majority of us on this website can afford it.
Many commonly eaten fish are considered too dangerous to eat frequently thanks to pollution levels.