Group warns of consequences in Arizona if mercury emission standard is rolled back
A report says lives and costs are saved with the Mercury and Air Toxics Standard in place.
UA shifting to more renewable energy with TEP deal
The university plans to get 60% of its power from wind and solar by the end of 2020 as part of the agreement.
Groups: Saving Mexican gray wolves requires new approach
Management of the endangered predators in the Southwest requires some rethinking, environmental groups say.
Study finds plastic in stomachs of 20% of Mexican fish
Microplastics are created when plastic breaks down in ocean water.
Project links river parks on Pima County Loop
Pedestrian bridges were just one part of the project to reinforce riverbanks to protect a gravel pit and I-10.
Researchers working to understand forest response to global warming
A UA ecologist's data is contributing to a global effort to track climate change effects.
Proposals would dam Little Colorado River for hydropower
The proposals are reigniting concerns brought up by a failed plan years ago to build a gondola into the Grand Canyon.
Animal-masked artists protest construction of border wall
A group of Tucson artists staged an art performance near Lukeville last Sunday.
Border wall construction in Arizona moves ahead
Preparations for more construction are underway near Douglas and on the San Pedro River.
Environmentalists concerned about two dam proposals near Grand Canyon
Opponents say the projects would disrupt the ecology of the area and damage a site sacred to the Hopi Tribe.
ADOT widens I-10, but will it be enough?
The number of cars traveling between Tucson and Casa Grande could quadruple in two decades.
Tucson cutting, but not canceling, recycling pickup
The curbside recycling service will be reduced to every other week, and the city expects to save $1.4 million a year.
Without government aid, fishermen in Mexico return to endangered porpoise habitat
Fishermen in the Sea of Cortez say they haven't received compensation like in previous years, so they're returning to the vaquita marina's waters for shrimp season.
Deal will use Bisbee wastewater to recharge San Pedro River aquifer
The project is meant to support the health of the river following decades of agricultural pumping.
Tucson is getting electric buses, but more people are choosing to drive
The buses could reduce the city's greenhouse gas emissions, but ridership is at a 10-year low.
