The Environmental Protection Agency says the U.S. Army Corps of Engineers shouldn’t approve a key permit needed for the proposed Rosemont Mine to start construction.
Davidson Canyon and Cienega Creek — linchpin issues for many who oppose the Rosemont Mine — aren’t in as big a danger from mine impacts as many people think, the U.S. Forest Service says.
The recent proposal to the Environmental Protection Agency by a group of stakeholders on the continued operation of the Navajo Generating Station offers a workable balance between economic and environmental concerns around the plant. The station is one of the largest producers of harmful nit…
The economy stagnates. Syria burns. Scandals lap at his feet. China and Russia mock him, even as a "29-year-old hacker" revealed his nation's spy secrets to the world. How does President Obama respond? With a grandiloquent speech on climate change.
The owners of a Benson-area power plant are promising to clean up more pollution than the federal government told them to - and at less cost.
The following editorial appeared Wednesday in the Washington Post:
High winds that sent huge dust clouds swirling last week caused Pima County to exceed federal air-quality standards for the first time in nearly four years, county officials said.
The following editorial appeared Monday in the Washington Post:
The following editorial appeared in Sunday's Washington Post:
The water table beneath three Arizona coal ash landfills lies 300 to 900 feet deep. The ground is tightly packed clay. The sites lie miles from populated areas.
For more than three years, the U.S. Environmental Protection Agency has been considering requiring new emission controls to reduce haze-forming nitrogen oxides (NOx) released as a byproduct of burning coal to create electricity at the Navajo Generating Station. The Central Arizona Project fo…
Arizona is challenging a federal decision that requires three coal-fired power plants to upgrade pollution controls.
WASHINGTON - In its first major regulation since the election, the Obama administration on Friday imposed a new air quality standard that reduces by 20 percent the maximum amount of soot released into the air from smokestacks, diesel trucks and other sources of pollution.
FLAGSTAFF - The U.S. Environmental Protection Agency has prescribed new pollution limits on three coal-fired Arizona power plants, aiming to protect the environment and air quality for wilderness areas and landmarks such as the Grand Canyon.
FLAGSTAFF — The U.S. Environmental Protection Agency has outlined a final plan for upgrades at three Arizona coal-fired power plants, including the Apache Generating Station in Southern Arizona.
DETROIT - Hyundai and Kia overstated the gas mileage on 900,000 vehicles sold in the past three years, a discovery that could bring sanctions from the U.S. government and millions of dollars in reimbursements to car owners.
Environmental groups want federal regulators to place a partly coal-fired power plant in Tucson under regional regulations designed to curb regional haze.
PHOENIX - The Environmental Protection Agency and Arizona have a common goal of following the Clean Air Act, but federal officials should recognize the "unique environment" here as they evaluate plans, a state official contends.
This male pygmy owl was sighted in the Altar Valley area on Arizona state land near Three Points in August 2003.