The List: "Green" Oldies

Everyone knows the sad state the planet's in, especially since it's making no effort to spare us from the effects of global warming. However, an entire generation produced a slew of environmentally aware hits and rarities in the late Sixties and early Seventies... songs that dealt with the dirty air and water, and warned of just these kinds of consequences. Some are folkish, yes, but some may surprise you! Here's my list of great green oldies.