These claims are hotly disputed by communities and environmental watchdog groups.
Scott Peterson, the executive director of Checks and Balances Project, an environmental watchdog group, agreed.
Ammonia emissions breached EU limits for the first time in 2016, the environmental watchdog has warned.
So far, Russia's environmental watchdog has withheld licenses for shooting the troublesome animals.
"This is historic news," said Frank O'Donnell, who heads the environmental watchdog group Clean Air Watch.
A new report entitled "Rubber Barons" by Global Witness, a London-based environmental watchdog, has highlighted the issue once again.
"This is a coup d'etat," said Andrew Mele, executive director of Hudson River Sloop Clearwater, an environmental watchdog group.
"To Indonesians, these problems are becoming commonplace," said Farah Sofa, national director of Walhi, Indonesia's leading environmental watchdog group.
Environmental watchdog organizations vigorously disagreed, and said the polluting effects of drilling would spread wide and far.
The country's environmental watchdog has threatened to revoke Imperial's production licences, which has sent its shares reeling.
Since 1980 the company has been fined 20 times for oil spills by Sao Paulo state's environmental watchdog, Cetesb.
