Protecting nearly a third of the planet’s land and oceans by 2030 is one of the goals of the United Nations Biodiversity Conference, or COP15. Biologist and documentarist Ricardo Gomes spends his life diving in Rio de Janeiro’s gorgeous, but heavily polluted, Guanabara Bay where marine life prevails. He says the bay is at grave risk. 

CGTN’s Lucrecia Franco reports.