Billions of masks are thrown away during the coronavirus pandemic – where do they end up?

At least three times a week, Herman Felani and five other volunteers collect medical waste from Indonesia’s Cisadane River in West Java.

He said medical waste including masks, used intravenous lines and medicine packets have increasingly found their way into the waters since the pandemic began.

“We alerted the authorities and police about the issue, but we still haven’t found the source of the waste,” he told the ABC.

Mr Felani’s volunteer efforts against the mammoth task of cleaning waterways…