Part 4/10:
While natural events such as volcanic activity contribute to atmospheric changes, human activities significantly outpace these processes. With elevated CO2 levels now at their highest in three million years, the ecological consequences are dire. As the sun's short-wave radiation hits Earth, heat is retained by greenhouse gases, primarily driven by activities like fossil fuel combustion. As a result, we face rapid environmental shifts that challenge the capacity of ecosystems to adapt or evolve, akin to the catastrophic changes seen during the extinction of the dinosaurs.