Should recreational marijuana be legalized?

This is for AP Capstone. We have to gather evidence that either supports or does not support our topic. We also have to do it through a lease; I have the PSYCHOLOGICAL LENSE. So Im write about whether marijuana should be legalized. I am going with no so I need evidence that supports why and I have to also just counter in one paragraph. All of which needs evidence to back it up. I need about 5-6 pieces of evidence of how marijuana effects someone psychologically which all in all shows why marijuana should not be legalized.

 
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