Over the past 30 years,the quality of outdoor air in most developed countries has greatly improved.

Name: Over the past 30 years,the quality of outdoor air in most developed countries has greatly improved.
Brand: Quizplus
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Question

Quizplus · Accepted Answer

Many developed countries have implemented stricter environmental regulations, leading to significant reductions in pollutants such as sulfur dioxide, nitrogen oxides, and particulate matter, thus improving outdoor air quality over the past 30 years.

Over the Past 30 Years,the Quality of Outdoor Air in Most