Jack is a businessman. His main task is to sell “Living Machines”. He is very interested in clean water. He is also interested in saving money. So it’s natural that he is to be a developer of a small and affordable system (系统) to clean waste water. His “Living Machine” can clean waste water in your home.
The “Living Machine” is a system for cleaning waste water. The waste water goes into a big plastic tank where bacteria (细菌) start to break down the waste. A few days later after it is dealt with, the water is brought into a greenhouse filled with plants and fish. With the help of sunlight, the plants and animals remove more chemicals from the water, making it cleaner. Then the water can be reused for washing or bathing. It can’t be used for drinking and cooking. But the water is clean enough for watering the flowers, washing the dog, or even for bathing or swimming.
The advantage of this technology is that it is affordable and good for the environment. If you have enough homes and businesses use “Living Machines”, you’d better buy it. It can help to use less fresh water. It can help keep the water supply unpolluted, too.
【小题1】Is the “Living Machine” too expensive for people to buy?【小题2】What is this “Living Machine” used for?
【小题3】How does the “Living Machine” work ?
【小题4】Do you think Jack’s invention is perfect? Why or why not?
