In this June 21, 2018, photo, laboratory manager Emily Savage demonstrates how she uses an instrument to photograph cannabis samples at CW Analytical Laboratories, in Oakland, Calif. (AP Photo/Jeff Chiu)
In this June 21, 2018, photo, laboratory manager Emily Savage demonstrates how she uses an instrument to photograph cannabis samples at CW Analytical Laboratories, in Oakland, Calif. (AP Photo/Jeff Chiu)
In this June 21, 2018, photo, laboratory manager Emily Savage demonstrates how she uses an instrument to photograph cannabis samples at CW Analytical Laboratories, in Oakland, Calif. (AP Photo/Jeff Chiu)