Choose the word CLOSEST in meaning to the underlined part.

Who knows how many different chemicals there are in our water, mixing and forming all kinds of deadly compounds.

Choose the best answer.

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.

Choose the best answer.

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

Find the mistake.

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

Choose the word OPPOSITE in meaning to the underlined part.

I don’t think we should kick the can down the road and let our next generation solve the global warming problem.

Choose the best answer.

Ecology is the study of our _____ environment.

Choose the best answer.

If it hadn't been for the storm, the farmers _________ a great harvest last year.