I've been thinking alot about the same thing lately....
I've been trying to increase the amount of local produce we eat although I'm not going so hardcore with it. I couldn't live without my coffee but now I'm ordering the Jasper's Free Trade online instead of buying the Lavazza at the shops.
I'm also starting to try and grow some of my own food and keep chooks.
The benefits aren't just environmental. I think that it's much healthier to eat fresh local foods in season than imported foods and there are also taste benefits. DH bought some of the US cherries that are in the shops at the moment and they were so hard and bland compared to the Australian ones.
I remember as a child that it would always be exciting when certain fruits came into season but now you can buy them all year round. I want my children to know some of that excitement and also to have the understanding of the seasons that comes with eating seasonal produce.