Why not green your diet and your wallet simultaneously?
According to this article by MSN Money correspondent Mark McCredie, it's possible to do both at once, as long as you focus on the staples and avoid the temptation to binge on chanterelle mushrooms at Whole Foods (just $39.99 a pound, while supplies last). An important part of his argument, interestingly, is that some of the savings afforded by a green diet come in the form of the money you won't have to spend on long-term healthcare costs.