The correct answer is D. Pass a law that limits carbon emissions
Explanation:
Air pollution refers to the existence of contaminants such as particulate matter and gases like carbon dioxide, ozone, among others that are in the air and represent a treat for life and environment. Additionally, most air pollution is caused by human activities and especially by the use of fossil fuels in cars and factories that release contaminant so the air. This implies, if a government wants to prevent or reduce air pollution the best way is to limit or reduce the pollutants released to air and therefore, the best step is to pass a law that limits carbon emissions, because in this way one of the most important air contaminants that is carbon dioxide can be reduced and therefore this would reduce or prevent air pollution.
