It takes religious belief without proof to deny industrial emissions-caused climate change.
A great history of climate science debate can be found here:
http://history.aip.org/climate/20ctrend.htm
At that link charts clearly show there is a rapid rise in global temperature beginning in the late 1800's.
Do you think this is happenstance? I could show you data that correlates the rise with CO2 build-up in the atmosphere. Physical models absolutely confirm that the temperature rate rise can be explained by CO2 emissions. Denial requires dismissing this science without an alternative explanation. Denial is not even psedoscience. Simply put science denial is a religious act.
Let's go back ten thousand years and have a look at what is happening today:
http://history.aip.org/climate/co2.htm#longterm
Yes, the earth was warmer 10,000 years ago. So what?
The rate in temperature rise is unprecedented in any geologic time for this planet. Do you think this is happenstance? The rapid rise in temperature is so fast that plants and animals can't adapt and die-offs are already occurring