I read an article a while ago that the temperatures on other planets in our solar system are rising as well.
That would mean the climate change is a natural event. As all the other climate changes have been since the beginning of this Earth.
Although I think the way we have been living for the last 200 years at least haven't been in the climate, or the planets best interest.
Couldn't there exit both though? For example let's say the temperature has been rising over the past 50 years, however during the past 5 years or so we entered a natural cool age due to various things like solar flares, etc.
The more people in a room, the hotter said room is. I am no expert on the atmosphere, so I have no idea whether or not it retains the heat given off by humans. BUT, if it does, there is a form of global warming happening as a result of human beings and our excessive ways.
It is also a known fact the earth goes through cycles in regards to climate. I would guess it has to do with both global warming and the climate cycles.