Although in recent years certain developed countries,such as the United States,have made significant progress in controlling pollutants,this is not the case worldwide.

Name: Although in recent years certain developed countries,such as the United States,have made significant progress in controlling pollutants,this is not the case worldwide.
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While some developed countries have made progress in controlling pollutants, many other countries around the world still struggle with high levels of pollution.

Although in Recent Years Certain Developed Countries,such as the United