(-40c) Kie, I used to work in a company that stored goods at (-37) and the rule was 40 minutes in there and back out for 20, and that`s in a static environment without wind chill factors Etc. Having been in those kinds of temperatures you have my sympathy. I`m not sure on the issue of global warming, one group of scientists say one thing, another the opposite. I am sure of one thing though, nature may not be a thinking, decision making entity but if we don`t respect and look after it then we could quite easily pay a terrible price for that. We are amazingly clever, we can send rockets to the moon, build amazing machines and exert great control over our surroundings, but we walk a fine line between beneficial technological advancement and detrimental arrogant complacency.