In strictly scientific terms there doesn't have to be an alternative theory. In standard science you have a theory and the "null hypothesis", meaning the theory is false. If the null hypothesis is indicated by the evidence then nothing more needs to be shown. Evolution theory and CO2 climate change theory both effectively operate without any "null hypothesis", i.e. they are treated as non-falsifiable.
Sweet. Conflate global warming and evolution. Pure propaganda. Doesn’t affect me but I solute your strategy.