Nice schoolies Scott.
Man-made climate change instead of global warming is the more scientific term, because it doesn't warm everywhere.
And yes, it changes all the time, but it boils down to the rate and amounts of change we are seeing in a relatively short time, that isn't seen in the historical, or geological past.
Remember, weather patterns and climate are two vastly different things.
This summer has been screwed up by a pervasive shift in the jet stream that has been pumping low pressure systems at us non-stop.
I just find it completely illogical how people can think we have zero impact on the earths climate.