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into your bloodstream. Of these, particles less than 2.5 micrometers in diameter,
also known as fine particles or PM2.5, pose the greatest risk to health.
Fine particles are also the main cause of reduced visibility (haze) in parts of the
United States, including many of our treasured national parks and wilderness areas.
How Can I Reduce My Exposure to PM?
You can use air quality alerts to protect yourself and others when PM reaches
harmful levels:
The reading of BR-smart translates air quality data into numbers and colors that help
people understand when to take action to protect their health.
2. What is Formaldehyde (HCHO) ?
Formaldehyde (CH₂ O) is a colorless, highly toxic, and flammable gas at room
temperature. It is used in the production of fertilizer, paper, plywood, and some
resins. It is also used as a food preservative and in household products, such as
antiseptics, medicines, and cosmetics. Exposure to formaldehyde can irritate the skin,
throat, lungs, and eyes. Repeated exposure to formaldehyde can possibly lead to
cancer.
Where is formaldehyde found?
Formaldehyde is found in:
Resins used in the manufacture of composite wood products (i.e.,
hardwood plywood, particleboard and medium-density fiberboard);
Building materials and insulation;
Household products such as glues, permanent press fabrics, paints and
coatings, lacquers and finishes, and paper products;
Preservatives used in some medicines, cosmetics and other consumer
products such as dishwashing liquids and fabric softeners; and
Fertilizers and pesticides.
It is a byproduct of combustion and certain other natural processes, and so is also
found in:
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