Name: How to grow greener marijuana?
Uploaded: Thu May 21 2015 16:29:30 GMT+0000 (UTC)
Duration: 8 min 41 s
Description: The owners of Happy Days farm in the northern triangle of California have developed a model to grow marijuana in a sustainable way. Tony Dokoupil and videographer David Zlutnick report.

May 21, 201508:41