We were nosing around in a used bookstore this weekend when we happened upon a stack of vintage copies of Mother Earth News, mostly from the 1970s. We thumbed through a couple of them and, well, we weren't really surprised ... more intrigued, to see so many green topics we discuss in 2007 (sometimes, we're ashamed to admit, as though they are entirely new ideas) totally explored in 1975. Of course, we're fully aware that the environmental movement predates An Inconvenient Truth, but still ... What happened? If the people at Mother Earth News were writing about alternative energy cars in 1974, residential solar power in 1979, and green roofs in 1972, then why are we still waiting on so much of this to hit the mainstream? We know we might be preaching to the choir, here. We're sure many of you have been living a green lifestyle since well before these articles were written. But it's really gotten us thinking: Why has it taken 30 years for presidential candidates, TV stars and our neighbors to start taking these green ideas seriously? If you have some time on your hands, we highly recommend that you browse through the Mother Earth News archive. It's fascinating, eye opening stuff.