Презентация по английскому языку Экология. Кислотные дожди


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Acid rain Every year more and more plants and animals disappear never to be seen again. Nature is very carefully balanced and if this balance is disturbed, animals can disappear alarmingly fast. Every day, thousands of species of animals draw closer to extinction. In many lakes fish are dying. Fishermen are worried because every year there are fewer fish and some lakes have no fish at all. The problem is acid rain. These factories send smoke high into the air.The wind often carries the smoke far from the factories. Some of the harmful substances in the smoke may come down with the rain hundreds of miles away. When it falls in lakes , it changes them too. The lakes become more acidic. It also kills the plants and animals that usually live in lake water. In some large areas trees are dying. Not just one tree here and there, but whole forests. At first scientists couldn’t understand why. There were no bugs or diseases in these trees.No! The weather was not dry. But now they think that the rain was the cause. Some kinds of trees cannot live in the soil that is very acidic. The protection of the environment is a universal concern. We must be very active to create a serious system of ecological security. Thank you for your attention!

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