A wheelbarrow and a handful of metal grids for capturing litter, emblazoned with the words "Renew Oceans,” sit rusting outside an empty, padlocked office in the Indian city of Varanasi, a short walk from the Ganges.

It is all that is left of a program, funded by some of the world’s biggest oil and chemical companies, that they said could solve a runaway ocean plastic waste crisis which is killing marine life — from plankton to whales — and clogging tropical beaches and coral reefs.

The closure of Renew Oceans, which has not previously been reported, is a sign that an industry whose financial future is tied to the growth of plastic production is falling short of its targets to curb the resulting increase in waste, according to two environmental groups.