Domestic air pollution

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Domestic air pollution

Dr. Sk Saha

Air pollution, a very sensitive question in our time. Our future generation breaths from a polluted urban air which consciously or unconsciously put them into hell. As soon as they come out from our own houses, they entrapped with polluted air. Are they not always entrapped with polluted air? Are we sure enough to qualify on domestic air? Our common strategy and belief that domestic house is always free from any air trouble. But it’s our mistake.

The air indoor under certain circumstances can be polluted to a hazardous level. This happens either when polluted air leaks into the house or evaporation from volatile organic compounds builds up inside a room. These conditions are worsened to hazardous levels if this happens in a confined space with good insulation that prevents dilution of the polluted air,

Indoor pollution from these sources increases in intensity with insulation, random is released from rock and soils that carry radium. Basically it present in unconsolidated sediments in the coastal belts. It is chemically inert but its decay products (polonium, bismuth and lead) may be inhaled, there by leading to lung damage, even though all three have a short life. Random is the suspected cause to thousands lung cancer deaths each year in United States. Asbestos due to its low cost shade material, we use it to decorate top floor of house etc. Asbestos fibers if released by insulation may be a potential source of lung cancer.

Cigarettes also contain numerous known or suspected carcinogens benzene, hydrazine, banzoa anthracene, benzo a pyrene (BAP), and nickel. A single burning cigarette releases particles to the order of 1012.

Now a day’s smoking is a public nuisance. As yet most of the place in our country is not non smoking zone. Even the institutions are the most smoke polluted zone in the country.

Small fraction of these particles may cause lung disease to the nearby person.

In our country, the wood smoke, which causes the most of the biomass burnt in the kitchen and the victims are the female race. The village kitchens are often windowless or the ventilation hole is closeted during the heavy rainfall of the wet days. The amount of particles and smoke depends the type of fuel wood. For example, Acacia created less smoke but high energy. But our village people uses mainly litter or husks of paddy or other food grains resulting interruption of heat but huge smoke. The exposure to particulate for women cooking a meal averages 7000 µgm 3 the figure refers to cooking with a one burner.

A double burner wood stove releases far more particles.

Such exposes happen several times a day and may continue for hours. The problem could be lessened if biomass is replaced by sustainable type of fuel or if better ventilation exists or the stove is better designed.

So, it’s our concern to improve our domestic air quality. To improve our life style we should not use any carcinogenic material. Even we should give up smoking in front of our spouses. The Earth is for all. We should keep in touch to improve its quality.

The author is Asstt. Professor, Environmental Science, Khulna University.