well you havn't really given me much to elaborate on, but i'll give it a shot.
true, the climate is constantly changing, but there is no such thing as a "normal" climate. it's a complex system that constantly fluctuates. heres a graph that you have probably seen before and probably dismissed as some sort of propaganda: http://ipcc-wg1.ucar.edu/wg1/FAQ/fig/FAQ-2.1_Fig-1.png
if you can find me any sound evidence that global greenhouse gasses have ever been remotely close to these levels, then i will gladly concede my argument (off you go then.

). and even if you were to find such a rise, you will not find one that rises so steeply. and try to decouple greenhouse gas levels from enthalpy levels if you wan't, i'm interested to see what kind of straws you clutch at with that one. skepticism is good, but not for stubborn, brainless twats like yourself.
i'm not going to elaborate on that one until you do, sweetheart, i'm eager to hear about these phanomen that you speak of.
the fact that you say that it could be these "natural phanomen" just shows that you yourself don't have any confidence in your pathetic arguments.
you. fucking. idiot.
Natural events which trigger climate change.
http://en.wikipedia.org/wiki/Milankovitch_cycles or http://en.wikipedia.org/wiki/Precession_(astronomy)
http://www.john-daly.com/solar/solar.htm
http://en.wikipedia.org/wiki/Caldera
There's plenty others, but i've made my point.
Perhaps you should read up on paleoclimatology and the Earth's climate history - http://en.wikipedia.org/wiki/Paleoclimatology