Pass the Cheetos
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For how long have humans been smoking marijuana?
A. 100 years
B. 1,000 years
C. 2,500 years
D. 1,500 years
C. 2,500 years.
The earliest evidence of psychoactive use of marijuana dates from 2,500 years ago in the funerary incense burners in the Pamir mountains of central Asia.