Bryson utilizes the example of ocean pollution to show, once again, that humans are frequently reckless with the environments we live in—this time, our oceans, which we pollute with toxic waste. This recklessness is foolish because we know so little about how our actions could impact our ability to sustain life on Earth. Humans, thus, are a tremendous threat to our own existence because we fail to acknowledge the delicate interrelatedness of everything on Earth, and we frequently disrupt the planet’s equilibrium.