2ANCIENTSince ancient times Nature has served Man being the source of his life. For thousands of years people lived in harmony with environment. But with the development of civilization man's interference in nature began to increase.
3An Apple as the WorldLook at the apple and use your imagination to think of what the apple could represent. We think it looks like the Earth. Let’s cut the apple into quarters. Three-quarters of the Earth's surface is water and only one-quarter is land.
4Let’s cut the piece representing land in half Let’s cut the piece representing land in half. Only one-half the land, or the total Earth's surface is habitable. The rest of the land is the deserts, mountains, frozen ice caps, and other places people cannot live.
5We take the piece that represents the habitable land, and cut it into 4 sections. Only 0.25 of the Earth's habitable land or one-thirty-second is where All the Earth's food come from.Let’s think what would happen if this part of the world were damaged or destroyed.
6Ozone depletion Water pollution Acid rains Greenhouse effect The ecological harmony is disturbed. Industrial enterprises emit harmful substances causing acid rains, greenhouse effect, ozone depletion. They pollute the air we breath, the water we drink, the land we live in.Acid rainsGreenhouse effect
7THE OZONE HOLE The ozone layer Up in the sky, above the air we breath, there’s a layer of gas called ozone. It helps us by blocking out rays from the sun that can harm our skin, and by letting the rays that are good for us come through. We’re lucky to have the ozone to protect us!
8WHAT’S HAPPENINGNow the ozone layer is being damaged by gases that people have made. The gases are called CFCs, and halons. They are used in refrigerators, fire extinguishers, air conditioners, plastic foam, and some other things.HOW IT HAPPENSThe CFCs float up to the top of the atmosphere, where the layer of ozone is, and “eat up” the ozone just like little Pac – Men.
9Water pollutionThe planet Earth is mostly water. Oceans cover the biggest part of it — there are lakes, rivers, streams, and even water underground. All life on Earth — from the littlest bug to the biggest whale — depends on this water. It's precious. But we're not doing a very good job of keeping water clean. In many places, the water has become polluted.
10RIVERS AND LAKES Rivers and lakes are polluted by garbage, or by poisonous chemicals which are dumped right into them.THE SEASThe ocean, which is a home to so much life, has been used as a place to dump garbage and poisonous chemicals for a long time. It's getting polluted, too.
11ACID RAINUP IN THE SKYWhen we look up, we see the clouds and the blue sky. But there are other things in the sky that we don't see. Some of these are harmful to the Earth.
12WHAT HAPPENS When power plants burn coal to make electricity, and when cars burn gasoline, invisible gases are released into the air. Some of these gases can mix with water and make it acidic, like lemon juice or vinegar.WHAT CAN HAPPENSometimes the gases get into rain clouds, where they get mixed in with rain or snow. Then the acid falls back to earth with the rain or snow. This is called acid rain.
13THE GREENHOUSE EFFECTA GREENHOUSE? A greenhouse is a building made of glass, where you can grow flowers and other plants that need a lot of warmth.HOW IT WORKSThe sun shines in through the glass and warms the greenhouse, and the roof and walls keep the heat from getting out.OUR GREENHOUSEThe Earth is surrounded by a blanket of invisible gases (with names like carbon dioxide) that act just like a greenhouse. The sun shines in, and the blanket of gases traps the heat like a roof, keeping it close to the planet. That's good — we can't live without warmth. WHAT'S GOING ONFactories, electric power plants, and cars are making a lot of new gases. Even trees, when they're cut down, give off the gases! These new gases are trapping more and more of the sun's heat. This is called the greenhouse effect, or global warming.WHAT CAN HAPPENIf the earth's temperature gets hotter by just a few degrees, it could change the weather all over the planet in big ways. Places that are warm would become too hot to live in, and places that are cold would become warm. The places that grow most of our food could get too hot to grow crops any-more.
14Let’s keep the Earth green and healthy and full of millions of wonderful creatures!