Imagine that you could dive deep into the Atlantic Ocean where the South American Plate and African Plate meet at a plate boundary.
Make a prediction: What do you think you would see at the plate boundary? Would you see the mantle? Why or why not?

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.

geologic time scale (for gradpoint) =)