Emissions from pulp plant.
Emissions from pulp mill.
The horizon at sunset as viewed from an airplane flying at 30,000 feet altitude.
Danger Asbestos Removal warning ribbon around building.
Coal fired steam electric plant, Centralia, WA: The TransAlta (Canadian owned) plant emits 10% of the state's greenhouse gas-emissions. It ranks 125th in the nation for mercury pollution. It emits 10.5 million tons of CO2 annually.
Capitol Reef clearest air 0784: Capitol Reef in southern Utah may have the clearest air in America.
Joshua NP air quality 9555: A sign at the Cottonwood Springs Visitor Center in the Joshua Tree National Park, CA posts the air quality and fire danger ratings in Jan. 2011.
Wind borne soil particles arising from farming on a commercial sod farm drift through adjacent housing development.
Wind borne soil particles arising from farming on a commercial sod farm.