Is it really?

https://www.wsws.org/en/articles/2019/08/12/pers-a12.html

Global warming, the study predicts, is feeding into other geophysical processes that aren’t directly related to carbon dioxide emissions, such as the mass release of methane from permafrost melting. This convergence threatens to produce a “Hothouse Earth,” where global warming quickens and is no longer directly related to the burning of fossil fuels. Such a scenario would be exponentially more difficult for modern scientific techniques to contain.

The consequences of such a development would be catastrophic. The extreme weather events of the past decade would be only the precursors of much more devastating storms, longer heat waves, dryer droughts and nonstop wildfires. Coral reefs across the world would die, eliminating significant parts of the food chain. Glacial melting and sea level rise would flood every coastal city on the planet, home to approximately one third of the world's population, potentially drowning billions of people. At least one million of the Earth’s species would die and continent-scale portions of the world’s surface would become uninhabitable.

Certainly seems so.