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Solar energy is not widely used _____ it is friendly to the environment.

Find the mistake.

Sylvia Earle, an underwater explorer and marine biologist, who was born in the USA in 1935.

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Scientists now understand _____.

Choose the word CLOSEST in meaning to the underlined part.

The local government tried to play down the seriousness of the disaster.

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He talked about his incredible experience of being _____ space, looking down on the Earth.

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Known worldwide by its panda logo, World Wildlife Fund (WWF) is dedicated to protecting _____ world's wildlife and the rich biological diversity that we all need to survive.