Well, that's very encouraging Stu. I do agree that one can only do one's bit in a small way, but if everyone did that, the problem would be much reduced.
As a tiny example, Tesco have out-of-season fruit and vegetables from far-flung lands (I don't buy them) while our lovely local store in Wroxham makes a huge effort to sell produce from local farmers, and their spuds, sprouts, cabbage, apples (always only stuff in season) are flavourful and delicious. They haven't travelled far, haven't used vast quantities of petrol, and are sold loose. They're remarkably cheap too. (No shipping costs) I also grow a lot of produce organically on our vegetable plot.

I saw a very distressing photo the other day of the carcasses of poor starved polar bears, washed ashore somewhere. The planet really is going downhill fast.
I don't have any children or descendants, and I doubt I'll live another decade, so I suppose I could bash around ruining things without caring. But I do care, very much.