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Farmers in Mexico ambushed soldiers and seized a dam to stop water payments to the United States, in a sign of growing conflict over increasingly scarce resources.
Lawns and landscaping provide surprising contributions to Los Angeles Basin's carbon emissions.
New research shows that while winter rains can temper the beginning of the wildfire season, monsoon rains are what shut them down. This monsoon season was the second-driest on record, leaving Southern Arizona dry and vulnerable.
Tropical forests may be more resilient to climate change than previously thought, according to a new study.
In a Southwest that’s getting hotter and drier while its population steadily grows, ecologists and Indigenous food activists are increasingly touting mesquite’s potential as a widespread, sustainable drylands crop and food source.
Development in Arizona's wildlands is making fires more expensive, and in some cases, more difficult to prevent.
Right now, a majority of Arizona is experiencing a severe drought, so bad that experts say it’s the worst on record.
Clean, abundant, solar power comes with a price. It requires lots of land, and in some places that's provoking opposition from people who want to preserve farmland.
Fire is a natural process, but it will take decades for some areas to recover or regrow habitat that burned this year.
A University of Arizona researcher is leading a National Science Foundation project that is integrating A.I. to simulate the nation's groundwater supply for the purpose of forecasting droughts and floods.