Comment by TehCorwiz

https://www.space.com/milankovitch-cycles#section-do-milanko...

From the article:

Climate change deniers like to argue that our planet would warm up no matter what, even without the greenhouse gas emissions that humankind is releasing into Earth's atmosphere.

Maliverno, however, says that the geological record doesn't suggest that this would be the case.

"There have been several campaigns in the past when researchers drilled into the Antarctic ice sheets and took samples from deep below the surface, reaching layers that are up to 800,000 years old," Maliverno said. "They analyzed the concentrations of carbon dioxide trapped in those layers. There are tiny air bubbles in the ice, essentially samples of the atmosphere as it was back then, and they found that even during the interglacials, the maximum amount of carbon dioxide was nowhere near the amount that we see today."

Moreover, Maliverno added, computer modeling studies that tried to reproduce the current climate change using only natural variables, such as the Milankovitch cycles, couldn't match the rate of warming we see today.