In 2017, a 16-year-old Polynesian surfer began growing coral fragments in underwater nurseries; his team later reported planting more than 221,000 corals across three countries

At just 16, a Polynesian surfer looked beneath the waves and saw a reef in trouble. Instead of simply watching corals disappear, he began collecting broken pieces, growing them in underwater nurseries and returning them to the sea.

Raccontata datimesofindia.indiatimes.com