When Lesley Ash walked into the University of Arizona's student union on April 13, she thought she would walk out having secured $150,000 for her campus-based club.

The Residence Life Recycling Program started its end of the year donation program April 27, which runs until May 16. Students are encouraged to donate items that they would otherwise be throwing in the trash.

Contamination of drinking water by pharmaceuticals and other substances is becoming a global problem. Scientists at the University of Arizona are investigating clean water technologies to combat the problem.

The City of Tucson, Pima County and the University of Arizona promised to work together to fight the “devastating effects” of climate change on the Southern Arizona region at an Earth Day climate change forum Wednesday morning.

Business owners and regulators clash over gas pump emissions regulations.

The City of Tucson’s Environmental Services will discontinue the Neighborhood Recycling Centers starting July 1.

Follow Earth Hour 2009 in Tucson

TUCSON, Ariz. — Officials in charge of major reconstruction of a five-mile stretch of Grant Road have turned the tables on criticism of the project’s impact on businesses and properties, citing the final project's green efforts and community involvement in the planning.

The Southwest has been home to its share of cats: mountain lions, ocelots and the small jaguarundis.

But there is one feline so rare that, until recently, most residents outside of the scientific community were not even aware of its presence. This animal faces more threats with the U.S.-Mexico border fence dividing its range and environmental and governmental organizations at war on how to preserve its shrinking presence in the United States.

The Sustainability and Energy EXPO9, held at the Tucson Convention Center March 6 and 7, featured dozens of vendors and environmentalists showcasing what's new in renewable energy and green living. Alternative fuel vehicles received lots of attention this year, but efficient home improvement methods such as rain-water harvesting and solar arrays were popular exhibits.