2. Other Pollutants: BC/EC, UFP, and SDS
BC/EC, a measure of airborne soot-like carbon, is formed from the
incomplete combustion of fossil fuels, biofuel, and biomass. Both
short-term and long-term exposures have been linked to adverse
cardiovascular health effects and premature death.1,7UFPs, defined as particulates with a diameter less than or equal to
0.1µm, are largely generated from combustion. Short-term and long-term
exposures have been associated with mortality and various
morbidities.1,8 SDS exposure, which affects desert
regions and countries affected by desert dust, may lead to an increased
risk for inflammatory and allergic lung diseases such as asthma and
cardiovascular mortality.1,9
The GDG determined that evidence was insufficient to establish
quantitative AQG and interim target levels. Instead, the following good
practice statements were formulated to aid the management of the health
and environmental concerns associated with these types of PM.