Lesson: Chapter 15 — The biosphere

15.4. Changing lifestyles and the problems they bring 4 of 5 Reset answers

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Question 4

What is the main cause of cataract given in the chapter?

A Too little exercise B Drinking hard water C Eating too much sugar D Exposure to ultraviolet rays

The right answer is the one marked above.

Exposure to ultraviolet rays. They reach the Earth through the thinning ozone layer.

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