What is with the Local grown food craze?Does it work or matter at all?

well, sometimes, people continue doing things that actually damage the ecology in a bigger way and then pretend that they are saving the ecology by trying and doing less useful things like this recent , Locally grown food , craze.
I call it craze, because first off,,it would not make much of a difference to the ecology if you eat locally grown food and yet burn gasoline like hell in your cars and eat animals.
Let me tell you why the Locally grown food craze is a fad.
The very reason why importing of foods started was to meet food shortages and to make nutritious vegetables available in regions which wont be able to grow vegetables year round.esp in snow wridden areas..So, yeah,, did a great job of making sure, we can sustain ourselves and have access to fruits and vegetables even in the winters in snowy regions..So, i don't see the point when people suddenly want to eat only locally grown food..Seriously, the very fact that for fifty years or so, we have already imported and used green revolution practices and this has already introduced newer plants to our region which were not native to our region anyways.Including potatoes and tomatoes which were not native to any of the regions where it is being extensively used in the cuisine in this century.I mean, will you stop eating potatoes and tomatoes, and aubergines and peppers to go back the ecology that was there in north america a good 300yrs ago?OH, no,,right?
So, i would really appreciate if people concentrate on real methods to deal with not altering the ecology rather than pretend to do something by eating locally grown food..For all you know, we will have to starve if we eat only locally grown food in the 6inches of snow..So, please, start doing the basics first and then think about the locally grown food.Would you stop using the car as much?no..oh , no..that would be inconvenient ..so you won't do that , will ya? well,,, first try doing that,,try using the bicycle more...do real things that will make an impact..then you can allow yourself to go crazy over the organic food and locally grown foods..k?