Part III. There is one mistake in each line of the following passage. Find, underline and correct them. (20 points)
The world is getting warmest and the oceans are rising. Why is this happening? One answer is that it could simple be part of a natural process. After all, there has been ice ages and long periods of warmth, so we could just be experiencing other warming trend. This kind of answer had less supporters a few years ago. What scientists now believe is that human activity is the cause. For more than two hundreds years, human had been gradually changed the atmosphere, mainly as a result of industrial pollution. We have created a atmosphere around the earth that, like a giant glass container, lets hot from the sun through and then holds them in. Will the temperatures and sea levels keep rising? The general answer is fortunately yes. 0. warmer
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