coral bleaching

People who live on the front lines of climate change are starting to get ready.
A "secret weapon" to save coral may not be as effective as previously thought.
These images show the dire threat to the world's reefs, which hold some 25 percent of marine life.
Using assisted evolution, researchers are developing corals resilient to warmer and more acidic water.
You may never see them, but coral reefs are suffering along with the rest of our planet.