| Indoor Air Quality |
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INTRODUCTION Did you know that the air in your home could be more polluted than the air outdoors? Also, your basic household items like pesticides, paint and air fresheners can significantly reduce the quality of air in your home? The fact is that the air quality in our homes can have serious impact on our health and especially our children's health. About one in five children in Singapore suffer from asthma, the fourth highest rate of childhood asthma in the world (Straits Times, Aug 12, 2000). Children are also susceptible to common ailments such as allergic rhinitis, wheezing and other respiratory disorders. Fortunately, improving air quality in your home is not difficult, all it takes is awareness and a little effort. You will find easy to follow tips in this site. Let's take the first step towards having healthier homes.
Indoor air pollution can originate from a range of innocuous sources in any home. These include:
While all these sources may individually emit insignificant amounts of pollution, cumulatively, they may reach hazardous levels. Poor ventilation of the home too can increase pollutant levels.
Have you ever experienced an unexplained bout of dizziness or sneezing fit? You may be suffering from the silent effects of indoor air pollution. Health effects from indoor air pollutants may be experienced immediately or years after exposure. Immediate effects are usually displayed after a single or repeated exposures. These could be:
Different people react very differently to pollutants with variants including age, pre existing medical conditions, individual sensitivity. Some of these immediate reactions are very similar to viral and bacterial infections such as the common cold, so it is often difficult to determine if the symptoms are due to exposure to air pollutants. One simple test is to check if the symptoms fade whenever the person is away from the home. Other health effects may appear only after long periods of exposure. These could be more serious results such as respiratory diseases, heart disease and cancer. Due to the wide variation in reactions to air pollutants, studies on direct links between specific health problems and concentrations or periods of exposure are still on going. While you should not be unduly alarmed, it is sensible to take some basic steps to improving the air quality of your home to safeguard yours and your children's health.
Solutions to air quality problems in homes involve eliminating or controlling the sources of pollution, increasing ventilation, and installing air cleaning devices. In this section, we will give you some practical tips on how to reduce air pollutants for some of the more common sources, as well as some basic methods you can adopt to improve the general air quality in your home.
The rate of formaldehyde release from products like pressed wood or textiles can change. Generally, new products coupled with high indoor temperatures or humidity have higher emissions. At elevated levels (above 0.1 parts per million), exposure to formaldehyde may cause watering and burning sensations in the eyes and throat, nausea, and breathing difficulty in some individuals. High concentrations may trigger breathing difficulty in people with asthma and prolonged exposure may cause cancer in humans. TIPS
Paints, varnishes and wax all contain organic solvents as do many cleaning, disinfecting and even cosmetic products. These solvents can release Volatile Organic Compounds (VOCs) while you use them and even when they are stored. Depending on the level and length of exposure, many VOCs are cancer causing and can cause irritation to eyes and respiratory tract, visual disorders and memory impairment. TIPS
Pesticides used in and around the home include products to control insects (insecticides), termites (termiticides), rodents (rodenticides), fungi (fungicides) and microbes (disinfectants). They are sold as sprays, liquids, sticks, powders, crystals, balls and foggers. It is important to remember that these products are toxic and can be dangerous if misused. TIPS
If you've heard it once, you've heard it countless times. Smoking is hazardous not only for the smoker but also for those around the smoker. The smoke from a cigarette, pipe or cigar contains cancer causing compounds. Infants and young children whose parents smoke in their presence increase their risk of contracting pneumonia, bronchitis, asthma (in susceptible individuals) and other respiratory diseases. TIPS
Mold can be found almost anywhere; it grows on virtually any substance when moisture is present or accumulated, including wood, paper, carpet and food. Asthma episodes may be triggered in individuals with an allergic reaction to mold. TIPS
Proteins in the dander, urine, or saliva of warm blooded animals (e.g., cats, dogs, mice, rats, gerbils, birds, etc.) may cause allergic reactions or trigger asthma in individuals sensitive to animal allergens. TIPS
Dust mites are found everywhere, on carpets, upholstery, curtains, mattresses, stuffed toys and fabric. They multiply quickly in damp, warm environments. Body parts and faeces of dust mites can aggravate asthma and child eczema. TIPS
Droppings or body parts of cockroaches can be asthma triggers. Cockroaches are commonly found in populated cities such as Singapore. Certain proteins, called allergens, are found in cockroach faeces and saliva and may cause allergic reactions or trigger asthma symptoms in some individuals. TIPS
Dust particulates are airborne particles (less than 1 micron) that are invisible to the naked eye. When they pass through the human body's natural defenses and enter the lungs, they can become potential asthma triggers and cause breathing discomfort and respiratory diseases. Outdoor dust particulates originate from ambient outdoor air, building exhaust, vehicular sources, commercial and manufacturing sources, and regional haze due to forest burning. These contaminants usually find their way inside homes through windows and doors, openings or other pathways. TIPS
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