Over the weekend, Pennsylvania became the 24th state in the U.S. to legalize medical marijuana. For your April 20th, here are eight reads on cannabis, from one writer’s journey into America’s first legal pot festival in Colorado to a profile on a scientist researching safe pesticide use in Washington State.

“More Reefer Madness.” (Eric Schlosser, The Atlantic, April 1997)

“More Americans are in prison today for marijuana offenses than at any other time in our history.” In 1997, Schlosser examined the case to decriminalize marijuana. (Dive deeper in his award-winning two-part series from 1994: “Reefer Madness” and “Marijuana and the Law.”)

“The Scientist Pot Farmer.” (Brooke Borel, Undark Magazine, April 2016)

In Washington State, which legalized recreational marijuana in 2012, scientist Alan Schreiber has studied pesticides for 18 years. Working to further agricultural research, Schreiber focuses on safe pesticide use in cannabis production and provides safety workshops for pot farmers.

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