Презентация к уроку английского языка по теме: Atmoshere, Climate and the Environment
презентация к уроку по английскому языку (7 класс)

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ACID RAIN 24.10.22 Done by Tatiana Vereshkina

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Rain is very important for life. All living things need water to live, even people. Rain brings us the water we need. But in many places in the world even where you live, rain has become a menace. Because of pollution in the air, acid gases from factories, cars and homes, the rain is becoming dangerous for the life of every living creature. This rain is known as 'acid rain' . 24.10.22 Made by Tatiana Vereshkina

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WHAT IS ACID RAIN? Acid gases are produced when coal and oil are burned in power stations, factories and in our own homes. Most of these acid gases are blown into the sky, and when they mix with the clouds it can cause rain or snow. Lemon juice, vinegar and cola are all acidic. Rain is naturally acidic, but acid gases make it even more acidic, sometimes as acid as lemon! 24.10.22 Made by Tatiana Vereshkina

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Natural Acid Gases Nature can also produce acid gases, such as volcanoes. When they erupt, the smoke that comes out of the crater is also full of acid gases. 24.10.22 Made by Tatiana Vereshkina

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How Do We Measure Acidity? There is a special scale called the pH scale that measures the strength of acids. Acidity can be tested using litmus paper. Usually rain is a little acidic, and has pH of about 5.5. Acids turn litmus paper red. With a special paper called universal indicator, you can test levels of acidity. 24.10.22 Made by Tatiana Vereshkina

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What Are The Main Gases That Cause Acid Rain? When we burn fuels, chemicals called 'sulphur' and 'nitrogen' are released into the air. Mixing with water in the air – rain or snow they are transformed into different chemicals called 'sulphur dioxide' and 'nitrogen oxides', which can be very dangerous for plants, animals and people. Most of the 'sulphur' comes from power stations, which make electricity, and also from volcanoes. Most of the 'nitrogen oxides' come from car and truck exhausts. 24.10.22 Made by Tatiana Vereshkina

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A PROBLEM ALL OVER THE WORLD Air pollution can be carried over long distances. Acid gases can go high up in the sky, and then the strong winds can push them to other countries. The acid rain in Sweden can be caused by air pollution in Britain and other countries of Europe.From the USA the winds can blow pollution to certain areas in Canada. 24.10.22 Made by Tatiana Vereshkina

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HOW BAD IS ACID RAIN? When rain is acidic, it affects what it falls on: trees, lakes, buildings and farmland. Acid rain can be very harmful to the environment. Trees and plants can die as acid takes away important minerals from the leaves and the soil. Minerals are like vitamins for trees and plants. Without them, trees and plants cannot grow properly. 24.10.22 Made by Tatiana Vereshkina

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OUR HEALTH When we breathe in air pollution we can have breathing problems. When we drink from taps water can be contaminated by acid rain, which can damage the brain.. 24.10.22 Made by Tatiana Vereshkina

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BUILDINGS Acid rain can also ruin buildings because the acid eats into metal and stone. It also damages stained glass and plastics. Granite is an example of a harder stone that can resist the effects of acid rain. In many places in the world, ancient and famous buildings are affected by acid rain. For example, the Statue of Liberty in New York, USA, has had to be restored because of acid rain. 24.10.22 Made by Tatiana Vereshkina