Ah, horse apples Uncle Dave! I have heard this view stated somberly by others. If we are a plague on the planet, we are a plague that's responsible for the Taj Mahal, the Ninth Symphony, the Mona Lisa, Vincent Black Lightning, the Golden Gate Bridge, the Mandolin, Twelfth Night, the Gettysburg Address, Blackberry Blossom, Mudcat, and stuffed crust pizza. Nature would do just fine without us, and we have proved poor stewards of the planet, but the Earth will outlive us, and one million years from now will show only the slightest traces of us, like the dinosaurs. We really aren't that important in the eternal scale of things. We are as a poor player who struts his brief hour upon the stage and then is no more. Try to enjoy your brief hour.