english: And then we have two parameters which we were not able to quantify -- air pollution, including warming gases and air-polluting sulfates and nitrates, but also chemical pollution.
non_english: En dan hebben we twee parameters die we niet konden kwantificeren - luchtvervuiling, inbegrepen opwarmende gassen en luchtverontreinigende sulfaten en nitraten, maar ook chemische verontreiniging.