The living environment not only in towns and villages but also in open areas has been in danger for almost half a century. There are lot of human activities today, aimed at protection of enviroment. All over the world there are people polluting the land, the sea, and the air. The main reason for pollution is waste – something which is no longer needed. It can be yesterday’s newspaper, an old car, dirty bath water, smoke from a factory chimney. Some waste is dangerous because it contains poison. It is toxic waste. There are five billion people in the world. They all need to eat, dress and travel about. They buy new things and throw their old things away. Farms and factories, cars, trains, buses, planes produce the things and the waste too. Some poisonous gases go up to the air and make acid rain which kills treees and pollutes water and ground. Power stations produce smoke and toxic gases. There are technologies that can change waste into something different and useful. This is called recycling. For example old newspaper can be made into new paper. Recycling is more expensive than dumping. In Africa people wear shoes madd from old tyres or collect and dry cow dung and use it for heating. Recycling reduces pollution, conserves energy and materials and savec money. Plastic is longlasting material and its recycling is very difficult. Recycling at home is very important. Don’t waste food, water, energy, materials. We say that a person who cares about enviroment is green.