The Week: Why are the oceans in trouble? They can no longer absorb the damage inflicted by the 7 billion people on Earth. Over many decades, the human race has overfished key species to near extinction, and polluted them with carbon dioxide emissions, toxic chemicals, garbage, and discarded plastics. A groundbreaking new study, recently published in Science, warned that our oceans are being irreparably damaged by human activity and could be on "the precipice of a major extinction event." Coral reefs, home...