Unlike in the past 400000 years where CO2 levels lagged...
Ice Ages versus Man Made Climate Change.
This is a graph of CO2 concentrations and global temperature. If you look closely you can see that every time an ice age ends and the temperature starts rising CO2 levels lag behind a few hundred to thousands of years. http://www.futuretimeline.net...; width="558" height="454" />This is a graph showing the same thing except for the years 1850-2000. At the year around 1975 a big change takes place in the way CO2 levels and temperature are related. Unlike in the past 400000 years where CO2 levels lagged behind temperature; starting around 1975 the CO2 levels rise almost Simultaneously. In the past 25 to 40 years there have been no worldwide effecting volcanoes, asteroids, or anything else that could cause that change the relationship between CO2 and temperature other than humans. Another element of evidence is that "when climate model simulations of the last century include all of the major influences on climate, both human-induced and natural, they can reproduce many important features of observed climate change patterns. When human influences are removed from the model experiments, results suggest that the surface of the Earth would actually have cooled slightly over the last 50 years. The clear message from fingerprint studies is that the observed warming over the last half-century cannot be explained by natural factors, and is instead caused primarily by human factors."-http://en.wikipedia.org... This is a graph of the results: http://upload.wikimedia.org...; /> With this you don't even have to be a scientist to find that with no human influence it's incredibly different. Also even if CO2 isn't enough; scientists have found a new green house gas that produced by humans and is 7100 times stronger than Carbon Dioxide. http://en.wikipedia.org....