Вопрос: Read the text and answer the questions. Explain the words in bold. 
1    What pollutes air indoors? 
2    What happens if we don't allow fresh air into our houses frequently? 
3    What problems can stale air at home cause? 
Clean Air at Home 
Air pollution doesn't just come from factories and our cars. We also cause it at home with the products we use and the way we live. Air indoors can be polluted by cleaning products, dust, paint, insect sprays, cigarette smoke or steam from cooking. We often need to keep doors and windows closed to keep the insides of our houses cool in the summer or warm in the winter. This traps pollutants and can make places for insects, dust mites and mould to live. Some pollutants such as smoke and insect sprays can cause breathing problems such as asthma, especially for those people who are allergic to dust. To reduce air pollution at home you should open the doors and windows 2-3 times a day, use natural cleaning products, and do not allow smoking. 
1    Do people smoke cigarettes in your house? 
A Never    В Sometimes    С Often 
2    Do you use water-based cleaning products to clean your house? 
A Yes, always    В I try to    c I don't check 
3    Do you clean your air-conditioning filter? 
A Yes    В Sometimes    С Where is it? 
4    Do you ever enjoy light meals that require little or no cooking like salads? A Often    В Sometimes    С Not very often 
5    Do you clean bedding and items used by your pets regularly? 
A No, never    В Sometimes    С Yes, often 
Mostly 
As: Great work! 
Bs: Try using more of the techniques in the text to reduce air pollution. 
Cs: You can do much more to reduce air pollution. Try harder.
Категория: школьный раздел
Ответы:
1 The air indoors is polluted by cleaning products, dust, insect sprays, cigarette smoke and steam from cooking (Воздух в помещении загрязняется моющими веществами, пылью, спреями от насекомых, сигаретным дымом и парами от приготовления пищи).
2 If we don't allow fresh air into our houses frequently then we trap pollutants (Если мы не обеспечивает приток свежего воздуха в наши дома достаточно часто, то мы удерживаем загрязнения внутри).
3 Stale air can cause breathing problems such as asthma especially for people who are allergic to dust (Спертый воздух может вызвать проблемы с дыханием, такие как астма, особенно у людей, страдающих аллергией на пыль).

Объяснения слов жирным шрифтом:
indoors: inside a building (в помещении: в здании)
paint: coloured liquid to coat a surface or make a picture (краска: окрашенные жидкости, с помощью которых покрывают поверхность или делают снимки)
insect sprays: chemicals used to kill insects (спреи от насекомых: химикаты, используемые для уничтожения насекомых)
cool: not warm (прохладный: не тёплый)
traps: preventing from escaping (ловушки: предотвращают побег)
pollutants: gases and chemicals that pollute (загрязнители: газы и химические вещества, которые загрязняют)
dust mites: tiny creatures that live in small particles of dirt (пылевые клещи: крошечные существа, которые живут в небольших частицах грязи)
mould: bacteria that grows on old food or damp surfaces (плесень: бактерия, которая растет на старых пищевых продуктах или влажных поверхностях)
breathing problems: difficulty getting air in and out of lungs (проблемы с дыханием: сложности при получения воздуха в и из легких)
asthma: a lung condition that makes it difficult to breathe (астма: состояние легких, при котором трудно дышать)
allergic: become ill when you come into contact with a certain substance (аллергия: заболевание, когда вы входите в контакт с неким веществом)
dust: small particles of dirt (пыль: мелкие частицы грязи)