[Radioheart]

It has been my observation that the more responsible media outlets and (in the USA) our new more progressive leadership has rather preferred the term Climate Change to broach the subject of human influence on the climate and atmosphere. Global Warming has become much too divisive and doesn't adequately describe the phenomenon. Should the climate change, some places may get colder.

However you name it, hard to imagine we could make such a significant change in our atmosphere (increased CO2 levels) without having some measurable, observable affect on the global climate. These effects may not have manifested themselves to the extent we can link them to the changed composition of our atmosphere with complete certainty, at least not with the currently observable data, but surely some change will take, and has already taken place.

One thing I think gives a lot of perspective, especially in the context of those who think the earth is such a big place and cannot imagine how we could affect anything on such a scale, is how thin our atmosphere really is. Travel 30 miles in any direction NESW and you'll probably be somewhere quite similar to the place you started. Travel 30 miles straight up are you are in the Mesosphere, the wispy thin border of deep space.