Question

how does the author elaborate on events that happened between 1955 and 1970? complete the sentences.
the author provides facts about the governments ? of laws to fight smog. research led the government to ? that cause air pollution. in response, many businesses were forced to improve their ? .

Explanation:

The question asks about how the author details government - related actions against smog and air - pollution between 1955 and 1970, and business responses. We need to fill in the blanks with appropriate words based on the context of the text (not provided here but inferred from the question). The first blank likely refers to the government's action of passing or enacting laws. The second blank could be about regulating or banning sources of air - pollution. The third blank might be about business practices or equipment related to reducing pollution.

Answer:

The author provides facts about the government's enactment of laws to fight smog. Research led the government to regulate that cause air pollution. In response, many businesses were forced to improve their practices.