Air contamination caused by human activity

Much of the research on factors affecting the respiratory diseases has been done in urban areas of developed countries. A number of studies have suggested that ambient air pollution can trigger these diseases. In many homes in developing countries a major source of exposure to indoor air pollutants is cooking smoke.

Increasing prevalence of diseases in both developed and developing countries has been a major public health challenge for more than two decades. Exposure to several specific air pollutants, such as respirable particulate matter, carbon monoxide (CO), sulfur dioxide (SO₂), and nitrogen dioxide (NO₂) has been associated with increased respiratory diseases. Besides, household cleaning agents, pesticides, and mosquito coil smoke can be referred to environmental factors.

High volumes of a number of health-damaging airborne pollutants, including above-mentioned plus formaldehyde and dozens of toxic polycyclic aromatic hydrocarbons, and other organic matter generated indoors can be vented to the outside and pollute the air.

Speaking:

Exercise 7. Make the summary of two texts, using key vocabulary and tell about:

1. what is haze;

2. what organizations investigate the state of the air in the world;

3. what are the reasons of air pollution;

4. what the disruption of the Earth’s cycle can result in;

5. who is blame for pollution;

6. why the problem of air pollution should be recognized.

Checklist for Section III

1.What is the structure and translation of Objective Infinitive Construction into Russian?

2. What is the meaning of derived abstract nouns?

3. What sources of air contamination are recognized in the world?

4. What harmful factors of air contamination cause diseases?

Section IV

Grammar: Participle I (the adverbial modifier of time).

Word-formation: suffixes of abstract nouns.

Speaking: The reasons and consequences of electrical hazards.

Learn the pronunciation and meaning of the words:

electrocution	[I‚lektrə′kju:ən] поражение электрическим током
to urge	[ə:dჳ] побуждать, убеждать, настаивать
circuit	[′sə:kIt] цепь, контур, схема
breaker	прерыватель
fire	зажигание
downed	поврежденный, выведенный из строя
fuse	запал
inadvertent	[‚Inəd′və:tənt] ненамеренный, неумышленный
backfeed	обратная связь
to shield	[I:′ld] защищать
caution	[′kɔ:ən] осторожность, предосторожность
to restore	восстанавливать
backup	обратная связь