Exposure to 100 r's :

•will have little effect
•can cause radiation sickness
•is enough to kill a person

?

Your answer is B. Radiation Sickness.

Explanation:

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Hope this Helps! :)

it is very expensive

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.