State plans must be at least as effective as federal OSHA, but some states, such as California, have chosen to adopt stricter standards. In four of these locations (Connecticut, Illinois, New Jersey, New York, and the Virgin Islands), the state plan covers public-sector workers only; private-sector employers are still covered by federal OSHA.
Your lungs can begin to clean themselves
Answer:
Because they can be really really bad for you and sometimes if they get too bad you could die. Or sometimes spread it to someone else.
withdrawal
this means that if you get addicted to the drug you will want more and more and u will have a withdrawal if you don't take the drug again
