Impact of Legislated and Best Available Emission Control Measures on UK Particulate Matter Pollution, Premature Mortality, and Nitrogen-Sensitive Habitats.

Past emission controls in the UK have substantially reduced precursor emissions of health-hazardous fine particles (PM) and nitrogen pollution detrimental to ecosystems. Still, 79% of the UK exceeds the World Health Organization (WHO) guideline for annual mean PM of 5 μg m and there is no enforcement of controls on agricultural sources of ammonia (NH). NH is a phytotoxin and an increasingly large contributor to PM and nitrogen deposited to sensitive habitats.