What did European policy makers realize about pollution in the 1970s?

No map. ie where is the map as this question cannot he answered without a map so the question as is is irrelevant and i am disappointed as i am a geologist.

Boreal forest another word for this is taiga.but it is a biomes, that stretches across the northern regions of north america, europe, and asia.~ hope this ! (if this is correct may i have brainy? )

If i were to guess i would say a