Scientists say California medical pot farms are draining streams
Uriel Sinai/Getty Images

Here's another topic of discussion for the "to legalize or not to legalize" debate.
Biologists in Northern California say medical marijuana farms are guzzling up water from adjacent streams and rivers, The Associated Press reports. Using Google's satellite map imagery, scientists were able to identify where exactly the pot gardens are located in relation to nearby river systems; they found that nearly 30,000 plants are being grown in each of four affected watersheds. While the study's authors say each plant uses about six gallons of water per day over a 150-day growing season, some of the farmers claim those estimates are way too high.
Still, biologists first noted the streams running dry more often 18 years ago — the same time California passed Proposition 215, which legalized the use of marijuana for medicinal purposes.
Subscribe to The Week
Escape your echo chamber. Get the facts behind the news, plus analysis from multiple perspectives.

Sign up for The Week's Free Newsletters
From our morning news briefing to a weekly Good News Newsletter, get the best of The Week delivered directly to your inbox.
From our morning news briefing to a weekly Good News Newsletter, get the best of The Week delivered directly to your inbox.
"We knew people were diverting water for marijuana operations, but we wanted to know exactly how much," says Scott Bauer, a department biologist studying the effects. "We didn't know they could consume all the water in a stream."
Sign up for Today's Best Articles in your inbox
A free daily email with the biggest news stories of the day – and the best features from TheWeek.com
Sarah Eberspacher is an associate editor at TheWeek.com. She has previously worked as a sports reporter at The Livingston County Daily Press & Argus and The Arizona Republic. She graduated from Northwestern University's Medill School of Journalism.
-
Ukrainian election: who could replace Zelenskyy?
The Explainer Donald Trump's 'dictator' jibe raises pressure on Ukraine to the polls while the country is under martial law
By Sorcha Bradley, The Week UK Published
-
The battle for 21st century naturism laid bare
In The Spotlight Nudist lifestyle falling out of favour in Germany but naked attraction is on the rise in the UK
By Chas Newkey-Burden, The Week UK Published
-
The Week Unwrapped: Why do young people love ASMR?
Podcast Plus can US football stamp out homophobia? And why is Scottish Gallic getting a TV boost?
By The Week UK Published
-
Pharaoh's tomb discovered for first time in 100 years
Speed Read This is the first burial chamber of a pharaoh unearthed since Tutankhamun in 1922
By Peter Weber, The Week US Published
-
Scientists report optimal method to boil an egg
Speed Read It takes two temperatures of water to achieve and no fancy gadgets
By Peter Weber, The Week US Published
-
Europe records big leap in renewable energy
Speed Read Solar power overtook coal for the first time
By Peter Weber, The Week US Published
-
Blue Origin conducts 1st test flight of massive rocket
Speed Read The Jeff Bezos-founded space company conducted a mostly successful test flight of its 320-foot-tall New Glenn rocket
By Peter Weber, The Week US Published
-
US won its war on 'murder hornets,' officials say
Speed Read The announcement comes five years after the hornets were first spotted in the US
By Peter Weber, The Week US Published
-
Dark energy data suggest Einstein was right
Speed Read Albert Einstein's 1915 theory of general relativity has been proven correct, according to data collected by the Dark Energy Spectroscopic Instrument
By Peter Weber, The Week US Published
-
New DNA tests of Pompeii dead upend popular stories
Speed Read An analysis of skeletal remains reveals that some Mount Vesuvius victims have been wrongly identified
By Peter Weber, The Week US Published
-
NASA's Europa Clipper blasts off, seeking an ocean
Speed Read The ship is headed toward Jupiter on a yearslong journey
By Peter Weber, The Week US Published