Addressing the Hazards of Particle Pollution Where Most Exposures Take Place—Indoors
Last month, new regulations took effect in California to address one of the most serious public health risks in the United States and around the world—particle pollution. The new regulations do not address vehicles, power plants, or other sources of pollution. Instead, they aim to reduce exposure to particle pollution where it occurs most—inside buildings. Particles in outdoor air enter buildings through cracks and gaps in the building and through natural or mechanical ventilation.