Right.
So, how does correlation relate to causation??
Oh yeah.....It doesn't.
It doesn't by itself. What we do is look at other evidence than the chart. For instance:
1) it is a scientific fact that CO2 and green house gasses absorb certain bandwidths of infra-red radiation more than other atmospheric gases
2) it is a fact that we have been producing enough CO2 to significantly increase the atmosphere's CO2 content. We know this based on the known approximate mass of fossil fuels burnt since the industrial revolution, and the basic chemistry that tells us how much CO2 will be released when a fossil fuel is burnt
3) We have observed said CO2 increase
4) We have observed temperature increases
Given that we know CO2 CAN cause the earth to warm, given that we've been emitting gigatons of the stuff over the past hundred fifty years or so, and given that we've observed a rise in temperatures - what other conclusion would you draw? Mere coincidence?
If I took a bucket half filled with water, and started pouring water in it, when it overflowed you'd claim that there's no proof me pouring more water in it caused it to overflow.
Let's suppose that we are filling that bucket. The bucket in this case is the warming produced by GHG's. About 3% of those GHG's are CO2 and about 3% of that CO2 contributed is man made.
We know that in times of warming that the Earth naturally produces more CO2 and we know both that CO2 is actually, right now, being released naturally in greater quantities than at any time in recorded history and that natural warming has always preceeded natural CO2 increases.
We further know that every Ice Age for a million years has started when CO2 was at its peak for that cycle. We know that every interglacial for the same period has started when CO2 was at its low point. Is this also causation in your argument? While there is a correlation, it is in direct conflict with your thesis.
Your bucket doesn't seem to hold water.
Pretty lame argument.
We are adding billions of tons of CO2 to the atmosphere every year. The effect of this increase in CO2 has been calculated by the scientists at MIT. They are saying that it will raise the temperature of the earth 5-9 degrees.
But what do they know compared to your vast knowledge!