Презентация, доклад Загрязнение окружающей среды

live for several days without water. But without air, we cannot live more than a few minutes.
We might foul the air so badly in some places that it could become unfit to breath. In some areas, the air is so bad that people become sick from breathing it, and some even die because of it.
The World Health Organization estimates that a billion people live in places where the air is substandard and that air pollution kills 8,000 people a day worldwide. About 90% of the deaths occur in developing countries.

is the contamination of air by the discharge of harmful substances.

appliances
vapors from building materials, paints, furniture
other materials within the home that emit unhealthy chemicals

outdoor air, the same pollutants can be found indoors. We spend up to 60% of our time indoors and our homes are not always the safe places we would like them to be.
These chemicals, some of which are called volatile organic compounds (VOC) can cause ill health and they are found in carpets, chipboard, furnishing fabrics, clothing pesticides, cleaning products, toiletries, cosmetics and hobby products.
Pollution exposure at home and work is often greater than outdoors. The California Air Resources BoardPollution exposure at home and work is often greater than outdoors. The California Air Resources Board estimates that indoor air pollutant levels are 25-62% greater than outside levels and can pose serious health problems.

(Chemistry Book)

windblown dust, and volcanic eruptions added pollutants to the atmosphere, and they still do so. Volcanoes spew ash and poisonous gases into the atmosphere.
Example: In 1995 eruptions of the Soufriere Hills volcano on Montserrat covered much of the Caribbean island with ash. The ash and fear of further eruptions caused the evacuation of more than half the country.
Dust storms, especially in arid regions, add massive amounts of particulate matter to the atmosphere.

eyes and nose, itchy irritated throat, and breathing problems. Some chemicals found in polluted air can cause cancer, birth defects, brain and nerve damage, and long-term injury to the lungs and breathing passages in certain circumstances. Above certain concentrations and durations, certain air pollutants are extremely dangerous and can cause severe injury or death.
Air pollution can also damage the environment and property. Trees, lakes, and animals have been harmed by air pollution. Air pollution has thinned the protective ozone layer above the Earth. Air pollution can damage buildings, monuments, statues, and other structures.
Air pollution also can result in haze, which reduces visibility in national parks and elsewhere, and can sometimes interfere with aviation.

and other greenhouse gases in the atmosphere lead to rise in earth’s average temperature.
Ozone
Greenhouse Effect
Acid Rain comes mainly from sulfur dioxide emitted from power plants and smelters and from nitrogen oxides discharges from power plant and automobiles. These acids are often carried far before falling as rain or snow. Acids corrode metals and even erode stone buildings and statues.