Max Armstrong reports on the expansion of legal marijuana planting in California. The crop requires water to grow and a new study by the Cannabis Research Center at the University of California. These farms are diverting water from rivers and streams. The researchers looked at water use in key production areas. They found that these farms rely on groundwater wells, but that could have an impact on wildlife.

Farm Progress America is a daily look at key issues in agriculture. It is produced and presented by Max Armstrong, veteran farm broadcaster and host of This Week in Agribusiness.

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