25~30題 Resources are important for humans. There are two kinds of resources. One is renewable energy because itcan fill again and again such as sunlight, wind, rain, tides, and geothermal heat. The other is non-renewable energy. It is limited and does not renew itself. What we know is coal, petroleum, and natural gas. To solve the problem of the reduction of the energy, we should not only save the energy but develop the renewable energy effectively. Solar energy is one kind of renewable resources. Neither human beings nor other creatures can live without the sun. Plants get sunlight to produce their nutrition. In the past, people dried the food under the sun in order to save it. Nowadays, people try to change the solar energy into other energy forms such as heat or electricity under the reduction of oil. It’s easy to see the products using the solar energy like lamps, watches, solar cars, greenhouses and so on. No matter how convenient those resources are, what we need to do is to know them better and to reuse them as more as possible.
25. Which subject can you find this article?
(A) Science.
(B) Music.
(C) Math.
(D) PE.