"Having said that, it is useful to know the effectiveness of the huge 'green Olympic' effort to clean up the air in Beijing," he said in an e-mailed response.
Overall, the Olympic pollution control efforts were worthwhile because "it demonstrated to the Chinese government that they need to pay more attention to the environment and it is good for the country. It also says that this is doable and the people have to be a part of the effort," he said.
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