It's fortunate that I happen to love shrooms.
I focus my environmental impact efforts on things like driving a ULEV vehicle, consolidating trips to drive fewer miles, and managing my heating and AC thermostats for efficiency. I have a fire in the fireplace right now, which is rare for me, but it is gas fired with high-ceramic content gas logs. It is going to be expensive, but it is lot cleaner than burning wood.
As for food, I buy as close to local as I can. I don't buy beef from Australia, or seafood from Asia, and certainly not butter from Ireland. I even buy California EVOO. Beef from Australia and seafood from Asia is cheaper (makes no sense to me), but I'll pay more for Texas beef, because it is good beef, and it only travels a couple-hundred miles, and buy wild caught US seafood, preferably from the Gulf.
I also avoid buying plastic wrapped produce, and the back of my car is full of reusable shopping bags.
I believe that if everyone just goes after the "low hanging fruit" of having a smaller carbon footprint, the combined efforts of billions of people would be amazing.
CD