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nitrogen oxides(6)
ammonia(5)
nh3(4)
nox(4)
air pollution(3)
carbon monoxide(3)
lrtap(3)
particulate matter(3)
sox(3)
carbon dioxide(2)
co(2)
co2(2)
energy production(2)
eu emission inventory(2)
lrtap convention(2)
pm10(2)
pm2.5(2)
so2(2)
sulphur oxides(2)
air pollution from energy(1)
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