What is the most environmentally friendly way to garden?
Do you know? I think that by gardening you would be hard pressed not to be improving the environment. Native trees I guess are probably the best things to grow, but a few pretty exotic species can't be that bad. Every plant captures carbon dioxide as it grows, no matter where its origins lie.
Probably the lawn is the least good for the planet, just because you mow it. But if the clippings are composted that probably makes up for it. Maybe someone should invent a solar powered lawnmower, or run an electric one off the solar energy on the roof! Of course there are the old push mowers, or even sheep. We used to move the guinea pig's run round the lawn to feed them, but it is a slow job, I suppose you could have a herd of them!
The vegetable patch has got to be good, even better than the 'locally sourced' shelves of the supermarket, if that's possible. Most vegetables are not native species, but the rabbits don't seem to have any objections. I think I can safely say that home produced veg is good for the environment and yourself, even if Brussels sprouts have gaseous side effects, but that's just part of Christmas.
I suppose that woodland must be the most sound, because that is what land reverts to if left to its own devices. Or is it that trees are the biggest plants so they push everything else out.
Probably the most environmentally friendly thing you can do in the garden is relax sipping a glass of water, but homebrew would be more fun. You can tell when you are relaxed because birds will start flying closer to you, then maybe some small mammals will come a bit closer.
So get out there and make your bit of the planet look a lot nicer, and you are probably helping to save it as well.