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Ms Mani suggests that bioremediation, a process using micro-organisms to break down harmful substances in waste, could be a more effective and eco-friendly solution.

City leaders inaugurated Kite Hill as a public space in August 1973, after Haag’s bioremediation pilot program was proven to reduce pollutants in the soil enough to grow edible plants.

Lucas Martínez Álvarez, who specializes in bioremediation at the Argentine Antarctic Institute in Buenos Aires, and his colleagues are using bacteria to remove hydrocarbons from soil around Argentina’s Carlini Base on King George Island.

Richmond sees an opportunity for bioremediation, by pumping the wastewater through tanks full of oyster species that consume plankton and incorporate radionuclides into their shells.

It's called bioremediation - planting vegetation that naturally removes pollutants in the soil, without the need to remove chemicals and dispose of them elsewhere.