№64 по английскому языку за 11 класс Н.В. Юхнель, Е.Г. Наумова, Н.В. Демченко
авторы: Н.В. Юхнель, Е.Г. Наумова, Н.В. Демченко
Учебник по английскому языку 11 класс Н.В. Юхнель. Страница 64
Use your background knowledge, the pictures and the chemical formulae in the box to guess the meaning of the highlighted terms.
ozone — O,
acid - HC1 or H2S04;
carbon dioxide — CO„;
the greenhouse effect
Read the article on pollution. Check your guesses.
In prehistoric times, people killed animals for food and built fires to cook food and keep themselves warm. They cut down trees for fuel, and their fires released pollution into the air. But there were so few people that their activities had little impact on the environment. In modern times, the world's population has been growing very fast. In 1850 there were around a billion people in the world. By 2011 there were about 7 billion. According to United Nations estimates, by 2050 the world population will have reached 8.9 billion people.
As the world's population continues to grow, there will be more people who need food, livestock and energy. This increasing demand will lead to increasing emissions of greenhouse gases. What are greenhouse gases? And what is the greenhouse effect? The greenhouse effect is a natural process, necessary for life to exist on the Earth: certain gases in the atmosphere act like the glass walls of a greenhouse - they let the Sun rays