I am ALL IN for real science.
--Man could indeed, have an impact on climate. Not yet proved, however.
--Meteorites have probably changed earth, climate, habitation in huge ways.
--Sunspot activity has probably impacted climate, habitation, hugely.
In all cases, REAL SCIENCE, would include economics, technology changes, etc.
Have you heard about the meteorite in Yucatan: In Russia?
Have you heard about how previous cold periods (Ice Ages) ended?