1.

Which of the following statement about ozone is correct? (a) It is essential for breathing. (b) It absorbs ultraviolet rays. (c) Its proportion in air is about 3 %. (d) It is mainly responsible for global warming.

Answer»

Which of the following statement about ozone is correct?

(a) It is essential for breathing.

(b) It absorbs ultraviolet rays.

(c) Its proportion in air is about 3 %.

(d) It is mainly responsible for global warming.



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