Canada removed toxic harbour sediment; fish returned after 30 years
Collingwood Harbour in Ontario, Canada, was once so degraded that it was named a Great Lakes area of concern in 1987. Heavy metals contaminated its sediment, nuisance algae spread through its water, and fish habitat was lost. Restoration followed as 7,300 cubic metres of contaminated sediment were cleaned up, sewage…
The Times of India ·