Black carbon particles in the atmosphere are considered one of the most dangerous pollutants after carbon dioxide.

Conditions have been ideal over the past few days for a buildup of dangerous pollutants like ozone, carbon monoxide and particulate matter.

Those measures, officials say, have already reversed the growth of the two most dangerous pollutants, lead and sulfur dioxide.

Residents of the county have pursued a long environmental justice struggle to remove dangerous pollutants from the site, to improve the health of citizens.

When it is near the ground, though, ozone is a dangerous pollutant that influences the health of all organisms.

Once the rule is final, these standards will ensure the remaining coal-fired plants, roughly 44 percent, take similar steps to decrease dangerous pollutants.

Chemist Jorge Alvarado works on ways to remove dangerous pollutants from the soil.

A new incineration policy will result in a 95 percent reduction in emissions of dangerous pollutants.

It seems clear to scientists and health experts that not enough progress has been made on limiting dangerous pollutants like ozone.

Lead is a dangerous pollutant which has been eliminated from the petrol used in cars.