The Northern Pulp mill in Boat Harbour is scheduled to shut down at the end of the month amid concerns about pollution and environmental racism after decades of effluent treatment. But before 1960, Boat Harbour was an unpolluted tidal estuary on the Northumberland Strait in Pictou County, Nova Scotia. The estuary covered about 142 hectares and was used by the local Pictou Landing First Nation community for fishing, food and recreational purposes. Now, it is used as a waste treatment lagoon for a pulp mill. This began in the 1960s and has provided thousands of jobs. Now that the mill is close to shutting down, here’s the series of events that led to this point…