And why the ASSumption that Earth's climate is static?
As I've been pointing out for years, thermometers with useful resolution have not been around long enough to have a meaningful temperature profile for ANY single location on Earth. Further, the large number and extensive geographic coverage of weather stations necessary for a meaningful profile of temperatures all over the Earth has been in existence for a century or so at most, and probably for only a few decades.
That's a verbose way of saying, "Mankind does not have the data necessary to support claims of any kind about global climate."
In examining samples of fifteen thousand feet of rock leading to the crystalline basement in the Williston Basin, and thousands of feet of accumulated sedimentary rock in areas from the Basin and Range of Nevada to West Texas (Permian Basin), through the Rockies, and in the Appalachians and Alleghenies as well, I can safely say that not only have the temperature and water depth and other surface conditions on the Continent changed drastically over the eons (as reflected in the properties of the rocks laid down and their environments of deposition), but that these natural processes which occurred long before the presence of humans resulted in surface conditions which would not be conducive to human life unassisted by technology.
Change is the only consistent thing, although the rate at which those changes occur varies, too.
You cannot preserve a dynamic natural system in stasis, any more than humans can stop the Earth in its orbit.