World Environment Day
{"name":"World Environment Day", "url":"https://www.quiz-maker.com/QPREVIEW","txt":"The Earth is estimated to be 4.6 billion years old. Modern humans have been on Earth for how long?, The global human population is projected to reach 9 billion by what time?, How much oxygen does the average adult need every day?","img":"https://www.quiz-maker.com/3012/images/ogquiz.png"}
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