Summary:
Thousands of small gunny bags soaked in the used motor oil were let into the lake on December 7, an entomologist from GHMC said. “The used motor oil was collected from motor service centres, industries to prepare oil balls,” he said. When motor oil circulates through an engine, it picks up heavy metals and other contaminants like arsenic, lead, cadmium, copper, zinc, chromium. However, environmentalists differ with GHMC over using oil balls in lakes. “Oil balls can only hurt aquatic life and won’t disturb the aquatic life,” the GHMC official added.