The Earth is one of eight planets that travel around the sun in the solar system. Of these planets, the Earth is the third nearest the sun. It is the only planet known to support life. About 5 billion years ago, a cloud of gas and dust began to condense into a solid mass – the young Earth. At first, this mass was very cold, but later it was melted by radioactivity. Heavy metals collected at the center and rocks floated near the surface. After millions of years, the rocks formed a hard crust and the oceans and the atmosphere appeared.
Слайд 3: Our planet Earth is alive
Many plants, animals and people live on the Earth. How do we treat it? Some people don't think that the Earth is very sensitive. We must protect the planet from/against pollution. Do you know how many cars are in the world? Do your parents have a car? What do you do with the trash? Do you sort the garbage out? Many animals, trees and flowers disappeared last century. People can't return them. Do you want to see the clear sky over your head? Do you want to see the moon, the sun and the stars? Do you want to swim in a clean river, lake, sea and ocean? If you care about your planet, you must not talk! You have to do something!
About 7 billion people live on the Earth. The number of people is increasing. However, the Earth is not increasing at all. Not all people can drink clean water and eat good healthy food. Only people in Europe, in Russia, in North America can eat good food. There are many countries with deserts... They appeared because of the problems with the environment. The desert is dead, vegetables and fruits can't grow in the desert. Also there is no water in the desert.
Many countries around the world celebrate Earth Day. It is a day that is meant to raise awareness and appreciation about the Earth's natural environment. Earth Day is now coordinated globally by the Earth Day Network, and is celebrated in more than 175 countries every year. Numerous communities celebrate Earth Week, an entire week of activities focused on environmental issues. In 2009, the United Nations designated April 22 International Mother Earth Day.