Light pollution is not (1) ……………. serious as water or air pollution.

Choose the word or phrase among A, B, C or D that best fits each blank space in the following passage.

Light pollution is not  (1)  …………….  serious as water  or  air  pollution.  (2) ……………., it is the type of pollution that (3) ……………. more in cities than in rural areas. In the past, we could sit out at night and (4) ……………. at glittering stars in the sky and light from objects in the outer space. Nowadays, cities are covered with lights from buildings, streets, advertising displays, many of which direct the lights up into the sky and into many unwanted places. The real problem is that it is very (5) ……………. to apply light to almost everything at night. Millions of tons of oil and coal (6) ……………. to produce the power to light the sky. Eye strain, (7) ……………. of vision and stress are what people may get from light pollution.

(8) ……………. light at night can harm our eyes and also harm the hormones that help us to see things properly.

(1) ....................

• A. more
• B. as
• C. much
• D. only