Moridin, in France, greener products ARE more expensive, and more, they cannot be found everywhere, or all at the same place. I have to buy my eggs and chickens and vegetables at one market, meat at another, cheese at again another. And I know for a fact that when you have to feed a family of 4 persons with a low French salary, you have to pay attention to the price of every product. I don't have an opinion on how it is in the U.S., but I know how it is here. The fact is that you have to make additional efforts to buy green stuff. For some it is a matter of choice, for a lot of others, it isn't. Here at least.
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The world is my oyster !