What role did American government play in setting environmental policies during the 1970s

In December 1970, environmentalists achieved a major goal with the establishment of the U.S. Environmental Protection Agency (EPA) through an executive order signed by then-president Richard Nixon. The creation of the EPA brought together several federal programs charged with protecting the environment into a single government agency. The EPA was founded with the goal of protecting human health and the environment by enforcing regulations passed by Congress. so this is the answer

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500 books can be produced by one man and a printing press within 5 months, while a copyist can only produce one in the same amount of time

zheng he was a chinese explorer who lead seven great voyages on behalf of the chinese emperor. his seven total voyages were diplomatic, military, and trading ventures, and lasted from 1405 – 1433. however, most historians agree their main purpose was to promote the glory of ming dynasty china.

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