Gisele Bundchen hugs her mother Vania as she sits on a "Snowmobike" in the Duracell Power Lodge, surrounded by her sisters. Patricia Bundchen, seen far left, is Gisele's twin. (PRNewsFoto / Procter & Gamble, Stuart Ramson)
The University of Arizona Tech Park will add a new solar-farm design to its solar-technology demonstration area next year, with the addition of a one-megawatt concentrating photovoltaic array.
State utility regulators approved new fees for Arizona Public Service Co. customers with solar-energy systems, in a decision that could ultimately affect solar customers in Tucson.
Singer-songwriter Chris Jamison has been getting to know Arizona one winery at a time.
Whether you are in favor of Rosemont Copper or opposed, your decision ought to be based on the most current facts.
The Arizona Game and Fish Department will get about $10 million over a decade from Rosemont Copper for land, water rights and wildlife projects to compensate for impacts of the proposed Rosemont Mine, the department announced Tuesday.
When Congress expanded the Renewable Fuel Standard in 2007, it did so with three important policy objectives in mind.
How did we reach the point where the government is promoting a dreadful fuel that gets worse fuel economy than gasoline or diesel, drives up food prices, damages car engines and has unintended environmental consequences?
A controversial dirt lot in downtown Tucson could finally see some long-anticipated construction now that lawsuits among the developer, city and Rio Nuevo Board are settled.
A German energy giant dedicated its first solar-energy installations in the U.S. on Monday under sunny skies in Tucson.
A 1950s church school building near downtown is getting a new life as a corporate headquarters.
There is not enough water. Supplies are decreasing due to drought conditions and demand is increasing.
A decision by state regulators to halt a move toward retail electric competition was met with relief by opponents and dismay by backers who said they will continue to press the issue.
If you live in an older home, Southwest Gas may be willing to replace your natural-gas lines — for free.
The University of Arizona Science and Technology Park is home to several massive solar-energy projects as part of its Solar Zone demonstration project.
Commuting Pima County employees put on more miles and used more energy driving to work during the first decade of the 2000s, a new study shows.
Workers headed to their downtown offices encounter congestion at West Congress Street and North Granada Avenue. The number of miles Pima County employees racked up on their drives to work grew between 2000 and 2010, a study found.
A Sky Crane helitanker retrieves fire retardant from tanks at a mixture base before making another run at the Gibson Fire outside Safford.
Tucson-based UNS Energy Corp. posted higher first-quarter earnings today as cold weather boosted energy demand.
A fire started by a space heater in a Picacho travel trailer spread to a second trailer, a car and a home just after midnight Tuesday.