The Earth is our home. What sort of home it is depends on how we treat it, just as the houses we live in depend on how we take care of them. Do you like to fish or swim? Do you like to walk through the woods? Do you like to breathe fresh air? Or to watch birds and hear them sing? If you do, we'll have to treat our Earth home in a different way. Why? Because we are making lakes and rivers too dirty for fish to live in or for people to swim in. Because we're cutting down our forests too fast, we are spoiling the nature. Because we're making so much smoke, dirty air often hides the sky and even near­by things. The dirty air makes it hard for us to breathe, and it can cause illness, and even death. Because we're putting so much poison on the things birds eat, they are finding it hard to live. Have you seen smoke pouring out of tall factory chimneys? Have you smelled the gas fumes from the back of a bus? Have you noticed the smoke from a jet plane taking off? All of these things make the air dirty - they pollute it. In crowded cities thousands of automobiles and factories may add tons of poison to the atmosphere each day. Have you wondered where the sewage from one house, many houses, a big city goes? It pollutes rivers and lakes and may even make them die. Fish can't live in them, and you can't swim in them. Have you wondered where the wood for houses comes from? And the paper for books and newspapers? From our forests. And what does the land look like when the trees are gone? Have you thought where the poison goes that we spray on gardens and grass to kill insects and weeds? Onto the things the birds eat, making it hard for them to live and share with us their beautiful colours and songs. Have you seen piles of old cars and old refrigerators? Not very nice to look at, are they? Have you seen piles of old boxes, glass jars, and cans? Not very beautiful, are they? If we don't do anything about this spoiling of the world around us - its air, its water, its land, and its life - our lives are not going to be so nice. But there is much that we can do. ' Factories can clean their smoke. Cars and planes can be made so that their fumes do not add to the pollution. The dirty water from factories can be made clean. Sewage, too, can be changed so that water is clean enough to use again. Fish can live again, and you can swim again in oceans, seas, rivers, and lakes. The mountains can still be covered with forests if the cutting of trees is done with care. We must plant again where we have cut. And we can have enough wood for hous­es and paper for books. There is no need to throw away things we do not want or cannot use any more. We can change many things back into what they were made of, and use them again. Old newspapers can become new paper. Old glass jars can be turned into new glass. Old iron can help to make new cars and refrigerators. We can also learn not to litter. We all know the sign: DO NOT LITTER. But not everyone does what the sign says. For a long time, people have used their Earth home without thinking of what was hap­pening to it. Now we see that we must treat it better if it is to be a nice home. It can be.