Explain how this demonstration models the way in which the intensity of sunlight shining on earth changes over the course of the year. be detailed in your explanation.

the national environmental policy act (nepa) is a united states environmental law that promotes the enhancement of the environment and established the president's council on environmental quality (ceq). the law was enacted on january 1, 1970. to date, more than 100 nations around the world have enacted national environmental policies modeled after nepa.

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