Giving dead reefs new life with fast-growing corals

Aired: 2/3/2015 | 0:05:47 | Clip
The world’s coral reefs are in perilous danger due to overfishing, pollution and climate change. But a team of scuba-diving scientists has developed a groundbreaking method for speeding up coral growth in hopes of stemming the underwater crisis. Hari Sreenivasan reports from the Florida Keys.