The other hypothesis referred to is that this planet is a living being. Every time something happens, a counter process counteracts any changes. More carbon dioxide is produced, the more life absorbs. Unfortunately, we are releasing carbon dioxide from millions of years ago and the planet cannot cope. Same with plastic garbage although life still finds a way to utilize it. Plankton will utilize plastic garbage as anchor points and create miniature colonies that nurseries of marine animals proliferate in.

Note the planet’s way of coping is limited. Polar ice has melted and no way for the planet to compensate.