For the sake of arguement, I will accept that the earth is warmer now that at anytime since 1500. If that is so, what made it so warm in 1500 and why is it not reasonable to assume that the forces at work 500 years ago are not now the forces at work warming the earth today? Why must it be blamed on industry and, in particular, the West?
"Why must it be blamed on industry and, in particular, the West?"
Simply because it is a convienient scam to transfer wealth from the US to the 3rd world. The ulitmate objective works like this. You take the worlds production of CO2 and divide by the worlds population to get a per capita value. Then you assign carbon quotas to each nation. Obviously, the US will produce more CO2 than it's quota while 3rd world nations will produce less. Under this system the US can 'buy' unused carbon quotas from the 3rd world. IOW, if you want to heat your home you pay a tax to the 3rd world.
Does anyone ever ask why it isn't getting warmer at the equator? Logically, any increase in temperature should be noticed first and be most pronounced at the warmest region.
I'll say it again... until these people can accurately predict what the weather is going to be next week, I won't believe anything they say about 100 years from now.