A growing “effluent plume” near the Museum of Old and New Art (Mona) was far from ideal a week before Christmas. Emails and reports show how the environmental emergency at a nearby Cadbury factory developed. A growing “effluent plume” near the Museum of Old and New Art (Mona) was far from ideal a week before Christmas. Emails and reports show how the environmental emergency at a nearby Cadbury factory developed. Water Pollution, Recycling and Waste Management, Environmental Impact Latest business news