سؤال قراءة ستيب محلول — الإشارة والمرجعية (تدريب 4339)

(1) Air pollution is a major problem all over the world today. Scientific research now shows us that indoor air pollution may be a much greater danger than outdoor pollution. In one 2009 study, researchers found 586 chemicals in the air of 52 typical homes in Arizona, USA. This led them to conclude that indoor air quality can be five times worse than outdoor air. Offices, factories and other places of work can be just as polluted as homes, maybe more so. In today's society most people spend up to 90% of their time indoors. We seal our buildings tightly to reduce energy costs. Equipment and buildings themselves, give off an increasing amount of synthetic man-made) chemicals and gases. There is inadequate ventilation and no access to fresh air, all these harmful elements are kept inside. This condition is known as "sick building syndrome" furnishings in buildings, and this condition is known as "sick building syndrome" (2) The sources of indoor air pollution can be easily pollen, identified. Air pollutants fall into three main categories: biological particles mold, bacteria, viruses, pollen, etc.). non-biological particles smoke, dust, heavy metals, radioactive isotopes, etc.), and gases carbon monoxide, formaldehyde, radon, etc.). In homes, there are four major sources of these pollutants: pressed wood products, carpets, paints, and furniture. Addition, the indoor air space of offices is full of volatile organic compounds (VOCs) produced by photocopiers, computers and other equipment. Dangerous pollutants can also be found in air-conditioned rooms in summer and rooms heated by coal or wood fires in winter. The kitchen is another place where the air may contain harmful gases from cooking stoves and non-stick Teflon) cooking pans. (3) Poor indoor air quality can cause a number of health problems. These include asthma, allergies, headaches, memory loss and fatigue tiredness). Eye and irritations can also result from bad indoor air. People who spend a lot of time indoors away from fresh air skin may suffer more from sore throats, colds and flu as well. The more serious long-term effects of breathing toxic airborne particles include heart and respiratory diseases in addition to different kinds of cancer. (4) There are a number of ways to improve our indoor air very simple and make our buildings healthier. One very simple solution is to get some houseplants. In India, people are already using plants to take the place of air filters. One business center in New Delhi has successfully used this method for fifteen years. For a building with 30 people, they used over 1,200 plants to clean the air. There are other things we can do in our homes. Open a few windows every day for five or ten minutes to change the air and do not allow smoking inside. Do not use non-stick cookware. Do not use synthetic materials for carpets and buy real wood furniture. Use natural materials such as cotton and wool for curtains and bedding. Do not use toxic cleaning materials or paints in your home. Finally, be sure to keep heating stoves and air conditioners in good repair and clean them often.