Question

air pollution
clean air act
air pollution reduction in the united states and other countries generally relies on laws that mandate lower emissions. in the united states, early air pollution laws included the 1963 clean air act, which urged scientists and federal groups to encourage states to reduce air pollution collaboratively. this laid the groundwork for amendments to the clean air act, allowing a strategy to reducing pollutants trends.
in 1970, a revision identified critical pollutants that required reduction. this led to the establishment of national air quality standards for these pollutants, setting both primary and secondary standards for human health and environmental quality. these standards tackle emissions, allowable levels, air pollutants, and they require states to create state implementation plans for air pollution reduction. the shift toward a cap - and - trade system has helped environmentalists make a more direct role in regulating air quality, encouraging such acts to formulate or even plan for participating in preventing air pollution. the comprehensive efforts regulate a core approach to reducing air pollution, with the federal government and the states.
what do the united states and other countries use to reduce air pollution?
options: promoting burning coal, enforcing actions in industries, laws mandating lower emissions, accessory devices

Explanation:

From the text, it's mentioned that the US and other countries use the Clean Air Act (which sets emission standards, etc.) and also have measures like setting air quality standards, reducing emissions through various plans. Among the options, "laws restricting power emissions" aligns with the regulatory approach (like the Clean Air Act) to reduce air pollution by controlling emissions from power sources (and other polluters). Promoting burning coal would increase pollution, so that's incorrect. Substitute actions in industries is vague, and accessory choices is irrelevant. So the correct option related to legal/regulatory measures to restrict emissions (like from power plants) is "laws restricting power emissions".

Answer:

laws restricting power emissions