A. disappear B. probably C. continue D. sometimes E. seldom |
People put sand into the sea to make new islands. Singapore, for example, is now 20 percent bigger than it was in 1965. Palm islands are three large man-made islands in Dubai, United Arab Emirates. They took 94 million cubic meters of sand to build.
If people using this much sand, it will run out in many places. For example, Vietnam may run out of construction sand by 2020, Live Science noted.
Since people need so much sand, they are trying to mine (开采) more of it. But this is bad for the environment. Mining sand may cause beaches to and more floods to happen in places close to the sea. Also, this will affect the habitats (栖息地) of many plants and animals.