Humans Are Causing a Larger Impact on the Planet than an Asteroid Impact or Flood Basalt

Carbon dioxide! Little did we realize 100 years ago how this simple gas would become such a cultural lightning rod. Yet here we are, in what might be an existential fight focused on how much carbon dioxide humans pump into Earth’s atmosphere. It isn’t a little bit, either. No, humans might now be the gold standard in carbon dioxide emissions in the history of the planet.