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UNIT 9

POLLUTION

Pollution is the introduction of contaminants into an environment that cause harm or discomfort to humans or other living organisms, or damage the environment. Pollution can be in the form of chemical substances, or energy such as noise, heat, or light. Pollutants can be naturally occurring substances or energies, but are considered contaminants when in excess of natural levels. Pollution is often categorized into point source and nonpoint source pollution. There are many types of pollution happening today.Our scientists are working with industry, regulators and the community to combat air, land and water pollution. Pollution threatens environmental sustainability and can have harmful effects on human health.

It is a complex and far reaching problem and includes:

air pollution: Urban and regional air pollution is a significant environmental threat. Industry, power generation and motor vehicles release pollutants that can lead to photochemical smog, haze and acidification. Air pollution also has very negative effects on our atmosphere. There is a hole in our ozone due to pollution in the air. If this hole gets bigger we won’t be as protected from the sunlight and it's heat. Many years from now this could pose a serious threat to humans.

land pollution: Land pollution can be caused by poor agricultural practices, pesticide use, mineral exploitation, industrial discharges and indiscriminate disposal of urban wastes.

water pollution: Pollution from sewage and drainage into rivers and oceans also is a serious problem for our environment. The water can be polluted by chemical and product leaks, which may cause the animals who live in the water to get sick. Animals who are high up on the food chain can also get sick from toxic build up in their bodies from eating other affected animals and plants.

Notes on the text

damage - збиток; втрата; шкода; пошкодження

excess – 1) надлишок, надмір 2) нестриманість; непомірність combat - битися, боротися

threaten - погрожувати, загрожувати release - звільняти, визволяти; випускати haze - 1. n імла, туман 2. v затуманювати hole - 1) діра, дірка; отвір

pose - 1) показувати 2) ставати в позу, позувати 3) формулювати, викладати; ставити, пропонувати (питання, завдання)

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