Awesome!
Some of them are new to me.
Let's not stop the tradition:
Enviromentalist
You have two cows
You kill one to limit methane production
You milk the other one for self-use and go work on your novel.
Vegan:
You have two cows
You release both and switch to soy-milk.
Enviromentalist vegan:
You have two cows.
You kill yourself.
[Spoiler](...Please note that you can limit your cows methane production by giving it natural food instead!)[/Spoiler]