Mark the letter A, B, C, or D on your answer sheet to indicate the best answer to each of the following questions.

Air pollution is such a serious ________that it has been a direct factor in the ______of millions of people each year.

Mark the letter A, B, C, or D on your answer sheet to indicate the best answer to each of the following questions.

Individually wrapped candy or chocolate causes a lot of trash, __________fruits and vegetables are healthier and mean less waste.

Mark the letter A, B, C, or D on your answer sheet to indicate the best answer to each of the following questions.

Sometimes it’s better not to buy something new, and buy ________one instead.

Mark the letter A, B, C, or D on your answer sheet to indicate the best answer to each of the following questions.

Fossil fuels which are non-renewable pollute the air and cause air _______.

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If wastes are thrown ____________, they can cause pollution in water, land and air.

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Trees not only bring nature to urban areas, but they also help clean the air by absorbing pollutants, ______oxygen, ______water, and growing food.

Mark the letter A, B, C, or D on your answer sheet to indicate the best answer to each of the following questions.

You should use electric fans instead of air conditioners _______they don’t emit dangerous gases.