Nothing like a comic strip to illustrate how selective use of data can be used to create a false impression, lol. Go back a few more decades and graph that. The 1930's had even less temps below 0.... So must have been " climate change" there too.
http://wattsupwiththat.files.wordpress.com/2012/08/spencer_ushcnv2_july-temps-us-1913-2012-max-min-avg.png
Yes there was, the climate is dynamic, ever changing. everyone agrees with this. The variables that cause the change are known (chaos theory, if you aren't stupid) helps map climate models using these variables, like sun intensity/output, glaciation etc.The problem is now the trend is going towards warming. This trend is exceptionally strong and our roughly couple hundred years of data keeping numerous record years were in this last decade, 2013 was no different.
Now if you agree with the above (only a moron wouldn;t) it appears the globe is heating up,something that normally happens, depending on.. take a guess the above variables. However, one of the variables green house gases,again naturally emitted (cows fart methane) also, has risen exceptionally in line with the rise in temperature.
Is this a problem? not really on a galatic scale but for humans it means, loss of land if the warming continues, species die off, more droughts etc. hence the rush to alter any effect we may be having. Now other variables can change (remember it's a dynamic SYSTEM) like sun output, if it decreases it will cool the earth despite our increase Co2, in fact we could make clouds (nasa has the techonology) which could solve the problem (application issue). However, the suns output is relatively steady and transient, meaning the underlying problem will persist. Can this system or ecosystem survive with that much co2? and ever increasing levels? yes, but it will look more like after earth with will smith and his daughter jada.
Are we causing it? it looks like it, you have a better answer that isn't simply the climate changes etc.. we know retard, we know, we know..... in fact, that hurdle was crossed about 150 years ago welcome to modern day science.
We know why it changes now, we can predict things now, we have satellites now, we know down to the decimal the precentage of gases in our atmosphere, complex interactions on massive scales have been predicted.
Your ignorance isn't an argument.
wall of text out.
