From the survey questionnaire introduction fresh water have made a graph, Esperanza Zen makes know, Thammasat University students. I don't know about how much fresh water, starting from the first question that, on this earth, there are a few percent of fresh water. The result is the number of students is 5% think there is on this earth are fresh water. 1% the number of students, 80% think this is fresh water located on the Earth. 3%, the number of students and 15% think that on this earth, there are 3% of fresh water which, in fact, on this earth, there are 3% of fresh water from the query that has more than 50% of the students pay attention about the fresh water used is significant in daily life.
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