Lichens are organisms that do not thrive in polluted air. Which graph shows how the number of lichen species changes from the centre of a polluted city to the unpolluted countryside 15 km away?
Biology 0610 · IGCSE · Pollution
Lichens are organisms that do not thrive in polluted air. Which graph shows how the number of lichen species changes from the centre of a polluted city to the unpolluted countryside 15 km away?