I have been following this thread with interest, now i just do not know what is causing the claimed global warming, but the only observation i made was when the kids all came out on strike recently for the cause. Now i was delayed in the throng, all chanting that action must be taken urgently, and almost every single one of them was swigging from a drinks can, or a bottle of water, so i believe a day off school heightened their sense of global warming, kt