Researchers fear more than half the world's coral reefs could die in less than 25 years and say global warming may at least partly to blame.
Sea temperatures are rising, weakening the reefs' resistance to increased pollutants, such as runoff from construction sites and toxins from boat paints. The fragile reefs are hosts to countless marine plants and animals.
So... right now, today, what are you going to do to change this? Will you keep your speed on the highway under 65 mph? Will you turn off that light you're not using?