The greater the concentration of Hispanics, Asians, African Americans or poor residents in an area, the more likely that potentially dangerous compounds such as vanadium, nitrates and zinc are in the mix of fine particles they breathe.
Pollutant and Greenhouse gas An air pollutant is a material in the air that can have adverse effects on humans and the ecosystem. The substance can be solid particles, liquid droplets, or gases. A pollutant can be of natural origin or man-made.
Pollutants are classified as primary or secondary. Primary pollutants are usually produced by processes such as ash from a volcanic eruption. Other examples include carbon monoxide gas from motor vehicle exhausts or sulphur dioxide released from the factories.
Secondary pollutants are not emitted directly. Rather, they form in the air when primary pollutants react or interact. Ground level ozone is a prominent example of secondary pollutants. Some pollutants may be both primary and secondary: Before flue-gas desulphurization was installed, the emissions from this power plant in New Mexico contained excessive amounts of sulphur dioxide.
Schematic drawing, causes and effects of air pollution: Thermal oxidisers are air pollution abatement options for hazardous air pollutants HAPsvolatile organic compounds VOCsand odorous emissions.
Substances emitted into the atmosphere by human activity include: Carbon dioxide CO2 — Because of its role as a greenhouse gas it has been described as "the leading pollutant"  and "the worst climate pollution".
Clean Air Act is deemed to regulate CO2 emissions. SO2 is produced by volcanoes and in various industrial processes. Coal and petroleum often contain sulphur compounds, and their combustion generates sulphur dioxide.
Nitrogen oxides NOx — Nitrogen oxides, particularly nitrogen dioxideare expelled from high temperature combustion, and are also produced during thunderstorms by electric discharge.
They can be seen as a brown haze dome above or a plume downwind of cities. Nitrogen dioxide is a chemical compound with the formula NO2. It is one of several nitrogen oxides.
One of the most prominent air pollutants, this reddish-brown toxic gas has a characteristic sharp, biting odor. Carbon monoxide CO — CO is a colorless, odorless, toxic yet non-irritating gas.
It is a product of combustion of fuel such as natural gas, coal or wood. Vehicular exhaust contributes to the majority of carbon monoxide let into our atmosphere.
It creates a smog type formation in the air that has been linked to many lung diseases and disruptions to the natural environment and animals.
Inmore than half of the carbon monoxide emitted into our atmosphere was from vehicle traffic and burning one gallon of gas will often emit over 20 pounds of carbon monoxide into the air.
Methane is an extremely efficient greenhouse gas which contributes to enhanced global warming.Environmental Hazards. Armin Ansari, Suzanne Beavers. AIR.
Air pollution has decreased in many parts of the world, but it is worsening in certain industrializing countries. If the traveler will be working in a moldy environment (such as on a medical or humanitarian mission), use personal protective equipment (PPE), such as gloves, . Learn how air pollution can harm your health and the environment and what EPA is doing to protect the air we breathe.
Environmental Hazards. Armin Ansari, Suzanne Beavers. AIR. Air pollution has decreased in many parts of the world, but it is worsening in certain industrializing countries. Polluted air can be difficult or impossible to avoid, but the risk to healthy short-term travelers is most likely low.
People with preexisting heart and lung disease. Discusses laws and regulations regarding air pollution, and lists pertinent organizations. Air pollution occurs when harmful or excessive quantities of substances including gases, Increased levels of fine particles in the air are linked to health hazards such as heart disease, Don't Breathe the Air: Air Pollution and US Environmental Politics, – (Texas A & M University Press, ) Gonzalez, George A.
Hazardous air pollutants are those known to cause cancer and other serious health impacts. The Clean Air Act requires the EPA to regulate toxic air pollutants, also known as air toxics, from categories of industrial facilities in two phases.