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question_answer1) Air is the mixture of gases. Which one of the following is a part of air?
question_answer2) Which one of the following gases a human inhale to be alive?
question_answer3) Which one of the following is true about global wind?
question_answer4) Wind is the _____________of air.
question_answer5) Air is the most important part of our life. Which one of the following is not filled up with air?
question_answer6) Which one of the following is true?
question_answer7) Air germs cause______.
question_answer8) The substance which causes pollution is called pollutants. What does pollution mean?
question_answer9) Which one of the following activities causes air pollution?
question_answer10) Which one of the following is true?
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