I'm going to go with a prolonged period of worldwide cooling? Lab tests that show CO2 is not a greenhouse gas? Isotope concentrations that show increasing CO2

I'm going to go with a prolonged period of worldwide cooling? Lab tests that show CO2 is not a greenhouse gas? Isotope concentrations that show increasing CO2 is not coming from anthropomorphic causes? Evidence that the glaciers are melting because of some other reason than it's hot?