@Istrickl Though CO2 is the poster boy of the CC debate, it is only in conjunction with the other far more "active" gases released alongside and as a result of human industrialization and fossil fuel use that we can say the problem is man made. Yes these swings and changes happen all the time, the problem is that the much bigger swings in the past have been gradual and for most have taken a couple of millenia to occur. The current problem is that we have caused this swing to happen so quickly that the flora and fauna are unable to adapt and this is a big problem for us as we live off them. People in general are also unaware that the use of fossil based fertilizers in farming while actually increasing yields over the last few decades have been the major cause of soil degredation and depletion. There are a large number of qualified people within the farming industries who are postulating that unless drastic changes are made, farming as is has at most 20 years left in the UK before desertification ends it.
Our problem is we have been too successful as a species in our rising ability to change the world as we want without knowing what it will do long term and in our ability to prolong life and provide safe secure living space, which has made use multiply at an unprecedented rate. After all it took several million years for the population of the UK to reach 20 million and then 5 decades to reach 60 million. Something had to give and the planet is showing us that it is starting to.