5. Global warming is caused by carbon dioxide from burning coal, oil and gas. (27) It was caused by human activities. (28) It presents seriously challenges. (29) A largest impact of global warming will be on many natural ecosystems. (30) Its impact will also be on people which live in developing countries. (31) Global warming will have its impact on people with little ability for adapt. Can anyone say how many wrong words are there in the passage?
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which chapter which subject
sorry I didn't get this question
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