We all know what it is, why it's caused and what the implications of it are, but recent research of old recorded accounts of varying shifts in the Earth's magnet feild present a new idea. Around 300 years ago every night British Navy personnel recoreded North and true North and now after analysing those centuries ago to todays North and true North, there is a off degree of 2, just 2 degrees you say? Well, around 700,000 years ago the Earth's magnetic field inverted ovre a period of time causing fluctuations in the field which will happen again, and is beleived to have started already due to those changes in the field. It is known by myself that it does fluctuate naturally anyway, but only by 0.5 degrees give or take. So if the field gets weaker due the the inversion then the Earth will be unable to be protected as much from the Suns ions and UV EM radiation, causing the planet to get hotter naturally anyway so why bother with the CO2, human contribution to it is only less than 5%, so our contribution doesn't matter in the long term, we should stop focusing on trying to stop it and focus on how to combat future problems due to it-we cannot stop it, it is inevitable.