Join the news democracyWhere your votes decide the Top 100
Boracay bay in the Philippines is reportedly turning green, due to untreated 'waste water'.
An environmental study identified the problem in 2015, a waste pipe releasing untreated water near the shore.
According to GMA news, locals have claimed the algae is an annual phenomenon.
Algae is a problem on east Asia's coastlines, regularly affecting China.
Yet scientists believe it is a tell tale sign of pollution.
Photos taken on Sunday reveal the extent of the problem.
The waste is causing a sludgy algae to develop on the surface of the water.
Previously the island's waters were much less green.
Clearer waters at Boracay Bay in October 2006.
HT GMA News
More: A map of the countries with the cleanest air