Pollution: N = Nitrogen input, P = Phosphor/Phosphate input, A = Acid input/acidification, T = toxic inorganic chemicals, O = toxic organic chemicals, X = Mixed pollutions.
Pollution: N = apport d’azote, P = apport de phosphore/phosphate, A = apport d’acide/acidification, T = substances chimiques inorganiques toxiques, O = substances chimiques organiques toxiques, X = pollutions mixtes.