Drug and alcohol use in our high schools – how big a problem is it? What can be done?

Is there something halachically wrong with using drugs? Alcohol? Vaping?
Can you tell on a classmate who is using drugs or alcohol?
What are the trends of drug and alcohol use in our high schools?
How are teenagers able to afford and access drugs?
Are we better – or worse – than secular society?
What can be done by parents and the schools?