How does carbon dioxide cycle through a biological system?

As you exhale CO2 is released into the atmosphere then giving the CO2 to plants and animals who rely on CO2 for respiration.

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.