[palmer]

But since our Sun is million times bigger than planet earth, Sun cycles cause 99.99% of climate change.

The relative size is irrelevant since the sun is 93 million miles away. The proper comparison is that the sun deposits 200 times more energy on the planet on average than manmade CO2 sends back to the planet. A 200 to 1 ratio should make it obvious enough that added CO2 doesn't matter.

[entropy12]

Yes distance matters too, but size matters as well. If sun was only 1000 times bigger than earth, we would have similar climate as Pluto has now.