I live in upstate New York, USA. Recently much of our forest and farmland is being stripped and solar farms are going up. My daughter, who operates a perennial farm, is concerned about the tons of herbicide used each year to keep the area around them clear. Another friend is concerned about the toxic waste produced when they are damaged or discarded. They do not track the sun and much of the year they are covered with ice and snow. Are these things really useful or are they merely a product of PC government grants. From a casual perspective, it doesn't seem like they could possibly be cost effective. =20 Thanks for your opinions, Allen --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .