In Los Angeles, I drive a hybrid and live in a very simple home. Anything you do from carrying a canteen of water to starting a recycling program in your office makes a difference. Reusing what you already have has always been green - from clothes to boxes to glass jars from the supermarket.
Given the opportunity, under the right conditions, two cells from wildly different sources, a yeast cell, say, and a chicken erythrocyte, will touch, fuse, and the two nuclei will then fuse as well, and the new hybrid cell will now divide into monstrous progeny. Naked cells, lacking self-respect, do not seem to have any sense of self.