23. Which of the following explains nitrogen fixation. *

Nitrogen fixation is the process by which atmospheric nitrogen is converted by either a nature or an industrial mean to a form of nitrogen such as ammonia.

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.