Hay consumption strains Colorado River's water supply

In a revealing study, researchers pinpoint cattle-feed crops like alfalfa as major consumers of Colorado River's water, stirring debates on water use efficiency and sustainability.

Ian James reports for Los Angeles Times.


In short:

  • Cattle-feed crops, primarily alfalfa, account for 46% of the water diverted from the Colorado River, emphasizing agriculture's heavy water usage.
  • The study offers a comprehensive look at water distribution across the Western U.S. and Mexico, aiming to guide future water conservation efforts.
  • Agriculture's significant share of water use, compared to urban demands, highlights the urgent need for strategic crop management and conservation initiatives.

Key quote:

“It’s important to understand where all of the water goes. This is the first complete and detailed accounting.”

— Brian Richter, lead researcher

Why this matters:

Alfalfa, known for its high water needs, is a key crop in the agricultural profile of states like Arizona and California, both of which rely heavily on the Colorado River for irrigation. The crop's cultivation consumes more water than any other in California, and it's a major user in Arizona as well, states that are already facing water allocation challenges due to the river's overextension.

Climate change—and the subsequent increase in droughts, flooding, and extreme heat—has held back agricultural gains and impeded global food security efforts.

a group of white corals on a coral reef

Podcast: Will coral reefs be gone by 2050?

Twenty-five years ago, a landmark paper warned that the world’s coral reefs could vanish by 2050. Now, halfway to that projected date (and amid ever more frequent coral bleaching events), that grim prediction feels increasingly close to reality.

A red sailboat in the water near icebergs

Climate change in the Arctic: How melting ice is causing Greenland to ‘shrink’

New research shows that Greenland is slowly “shrinking” and shifting northwest as melting ice reduces pressure on the land beneath it, causing the island’s bedrock to twist, stretch, and rise.

An aerial view of a whale with a school of fish

Drone surveys offer early warnings on whale health and survival

Scientists are using drones and photogrammetry to track how climate change is affecting whales’ health, growth, and reproduction. By analyzing aerial images, researchers can spot pregnancy trends and size changes in right whales and orcas, providing critical early insights into population declines.

Sun setting behind a power plant smoke stack emitting pollution

The strategy behind Trump's climate catchphrase, the 'Green New Scam'

Donald Trump’s use of the phrase “Green New Scam” has evolved from a rally insult to a central talking point in his administration’s efforts to dismantle climate science and erode public trust in environmental policy. Experts say the slogan is part of a propaganda strategy linking language to pro-fossil fuel policies.

An aerial view of the long beach port with a cruise ship in the background

California governor vetoes bill that would have limited air pollution regulation

California Governor Gavin Newsom has rejected legislation that would have restricted local air regulators’ authority over pollution at the Los Angeles and Long Beach ports, citing the need to preserve tools for combating air and climate impacts.

A pile of British pounds

How a ‘pro-climate’ charity channelled cash to a Koch-funded think tank

A UK charity that portrays itself as a climate leader facilitated a £830,000 donation to the Mercatus Center, a conservative think tank heavily funded by U.S. oil billionaire Charles Koch.

A hat that reads "Make America Great Again"
Credit: Photo by Natilyn Hicks Photography on Unsplash

Trump cuts climate-friendly Energy office jobs

The Energy Department offices impacted by Trump administration layoffs include those focused on climate-friendly energy sources amid the administration’s broader crackdown on renewables.

From our Newsroom
Multiple Houston-area oil and gas facilities that have violated pollution laws are seeking permit renewals

Multiple Houston-area oil and gas facilities that have violated pollution laws are seeking permit renewals

One facility has emitted cancer-causing chemicals into waterways at levels up to 520% higher than legal limits.

Regulators are underestimating health impacts from air pollution: Study

Regulators are underestimating health impacts from air pollution: Study

"The reality is, we are not exposed to one chemical at a time.”

Pennsylvania governor Josh Shapiro speaks with the state flag and American flag behind him.

Two years into his term, has Gov. Shapiro kept his promises to regulate Pennsylvania’s fracking industry?

A new report assesses the administration’s progress and makes new recommendations

silhouette of people holding hands by a lake at sunset

An open letter from EPA staff to the American public

“We cannot stand by and allow this to happen. We need to hold this administration accountable.”

wildfire retardants being sprayed by plane

New evidence links heavy metal pollution with wildfire retardants

“The chemical black box” that blankets wildfire-impacted areas is increasingly under scrutiny.

Stay informed: sign up for The Daily Climate newsletter
Top news on climate impacts, solutions, politics, drivers. Delivered to your inbox week days.