list one key similarity and one key difference between a vaccine and the pathogen it protects against

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.

1. efficient use of space

2. elimination of groundwater contamination

3. energy generation

4. lower carbon footprint