SAN FRANCISCO (KPIX) — The following 4 segments are from a KPIX 5 News in-depth look at the marijuana business in California since it became the first state to legalize the use of medical pot 17 years ago.

VIDEO: SEGMENT 1 (of 4):

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In this segment host Veronica De La Cruz introduces a report by Joe Vazquez on the explosion in illegal marijuana grow operations and the environmental impact of those activities.

VIDEO: SEGMENT 2 (of 4):

In this segment reporters Joe Vazquez and Cate Cauguiran look at the increased crime that the business of growing marijuana has brought to northwest California.

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VIDEO: SEGMENT 3 (of 4):

In this segment reporter Mike Sugerman, who was prescribed medical marijuana to treat pain from a heart condition, discovers that the strength and purity of the medical pot you can buy varies wildly.

VIDEO: SEGMENT 4 (of 4):

In this segment Phil Matier talks with California Lt. Gov. Gavin Newsom and San Mateo police chief Susan Manheimer.

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