The Swiss Family Robinson tells of the adventures of a family that is shipwrecked on an uninhabited island. The story was made up more than 180 years ago by a real Swiss family. They imagined they…
Most scientists think that the first tiny sea plants made it possible for life to come onto the land. To live, plants and animals must take in a gas called oxygen. The tiny sea plants and animals of…
mine or national park? > From open-pit mines such as the one in the top picture, we get a useful and important metal—copper. But this kind of mine destroys both land and plants. The bottom…
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