From the topics, I see most are taking on this list is that we are introducing additional energy into our ecosystem. Some from emissions into the air, some from the heat and energy released by using Earth's stored energy. If we ever do get a understanding of the effects this is making, how about a pro-active approach. Lets say putting reflective surface on land. This would radiate the heat that would have gone into the earth back into space. On the other hand, does a solar cell stay cool? What is the cooling effect of plants? How efficient is a leaf for converting the suns energy into hydrocarbons?. Would a piece of green plastic produce the same heating effect from the suns energy? Best regards, Giles -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body