18. legal drug abuse can't cause physical harm or dependence
a. true
b. false

19. the environment's condition has an effect on the inhabitants.
a. true
b. false

20. the presence of harmful substances in the earth's atmosphere is called earth pollution
a. true
b. false

Which statement describes the primary purpose of the european union? question 1 options: to protect european nations in the event of another world war to work together to strengthen europe and benefit all member nations to prevent alliances from forming between member nations to share resources and make economic trade easier between coal and steel companies