Frugal is "green." Well, most of the time, anyway. It's not very frugal to buy tissues from recycled paper at twice the price of that made from pulp and waste, but to each his/her own. I suspect that even the very frugal among us have their breaking points. If buying a "green" product that costs more than a "regular" product is your thing, by all means, do it...
Personally? I buy organic meat and vegetables as much as I can. I use raw milk and eat real butter. That stuff doesn't come cheap, but with a frugal mindset, I get by. Coupons, sales, zero waste and so on, work very well to keep costs down.
So what is green and frugal? Lots of things. Recycling at home by reusing fabrics, containers and other items, not buying excessive packaging and canning your own food are just a few things.
If you want to be green and frugal, it's easy. Just watch what you do every day to save money. You're no doubt already doing it.
Saving Money by Living Green
Before You Throw That Away
Transform these leftovers