What is an adaptation for cold, snow -covered environments

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.

the correct answer: the index of refraction of the second medium is lower i tried this persons answer and it was wrong this person is lying