Read the following passage carefully and answer the following questions.
INDOOR POLLUTANTS
1. Call it a blessing or a curse of Mother Nature, we have to breathe in over 10,000 litres of air in a day (more than four million litres in a year) to remain alive. By making it essential for life, God has wished that we try to keep the air we breathe clean. Everyone can see the food that is not clean and perhaps refrain from eating it, but one cannot stop breathing even if one can feel the air to be polluted.
2. Several harmful and noxious substances can contaminate the air we breathe. Generally, much is said and written about outdoor air pollution, most of which is due to vehicular and industrial exhausts.
3. Given the fact that most of us spend over 90% of our time indoors, it is most important to recognise that the air we breathe in at home or in offices can be polluted. It can be a cause of ill-health. Air pollutants that are generally present in very low concentrations can assume significance in closed ill-ventilated places.
4.The indoor air pollution can lead to allergic reactions and cause irritation to the skin, the eyes and the nose. But as is logical to assume, the brunt of insult by pollutants is borne by the lungs. It can lead to the development of fresh breathing problems, especially in those who have allergic tendencies, or it can worsen the existing respiratory illnesses like asthma and bronchitis.
5. There can be several sources of indoor air pollution. Tobacco smoke is one of the most important air pollutants in closed places. “Passive smoking” or environmental tobacco smoke (ETS) pollution can lead to all the harmful effects of tobacco smoking seen in the smokers in their non-smoking companions.
6. The next most important source of indoor air pollution is the allergens. House dust mites (HDM) are very small insects not visible to the naked eye and are the commonest source of allergy in the house. They are ubiquitous and thrive in a warm and moist atmosphere. They breed very fast and are very difficult to eradicate. Modem houses present ample breeding spaces for them in the form of carpets, curtains, mattresses, pillows, etc.
7.Exposure to HDM can be prevented by the frequent washing of linen and by encasing the mattresses and pillows in a non-permeable cover. Pets form an important part of life for some of us. But they can add plenty of allergens to our indoor atmosphere. Furry animals are notorious for doing this. Fine particles from feline fur can remain stuck to the upholstery and carpets for a long time even after the removal of the animal and lead to the worsening of asthma and skin allergies. Pets should be kept out of the bedrooms and washed frequently. To remove the fur particles one has to use vacuum cleaners as the ordinary broom and mop are not effective.
8. It is important to realise that the air we breathe at home may not be clean always and we must try to eliminate the source of pollution. We should give due consideration to ventilation
now answer this :
Q1. When can air pollutants become extremely dangerous even though in lower concentration?
options:
in well lit and open places
in chilly places
in ill-ventilated and closed places
in nicely ventilated places
Q2. How can exposure to HDM be prevented?
options:
by preventing all kinds of ventilation
by not doing laundry every week
by using mosquito repellants
by regularly cleaning the curtains and carpets
Q3. Which of these is NOT true about House Dust Mites?
options:
they are ubiquitous
they are not visible to the human eye
they breed fast
they are easy to eradicate
Q4. How do furry animals add to the allergens?
options:
they are the allergens themselves
the allergens from their fur can stick to the articles in the house
the food they eat contains allergens
the allergens come from their saliva that drools when they eat
Q5. The word 'feline' means ____________.
options:
related to cats
related to mosquitos
related to dogs
related to pigs
Q6. Respiratory diseases affect the _________ most.
options:
liver
intestines
lungs
limbs
Answers
Answered by
10
Answer:
what is essential for our life?how?
Answered by
5
Answer:
The answers are written below:
Explanation:
1. In ill-ventilated and closed places.
2. By regularly cleaning the curtains and carpets.
3. They are easy to eradicate. (IT IS NOT TRUE ABOUT HDM).
4. The allergens from their fur can stick to the articles in the house.
5. 'Feline' means related to cats.
6. Respiratory diseases affect the lungs most.
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