Before marijuana is ready for sale in Nevada dispensaries, it must first go through a laboratory screening process for a variety of pesticides and contaminants, as well as tests to determine potency levels.

Recreational marijuana isn’t legal at the federal level, meaning there are no federal standards or regulations for approving cannabis products for sale.

That leaves policymaking up to each state.

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Kelcie Grega ~ LasVegasSun.com ~