Broek in Waterland, De Volgermeerpolder, Volgermeer was used in the 20th century as a landfill site for chemical waste. The area is considered the most heavily polluted area in Western Europe. The area has been remediated using a natural capping method, the contamination has been sealed, a peat layer will eventually take over the function of the sealed materials. .© 20 juni 2018 Marco van Middelkoop/Aerophoto-Schiphol