Volkswagen will have to stand trial in Arizona over the sale of diesel vehicles that were sold to state residents as emitting less pollution. In an order made public Wednesday, Maricopa County ...

WASHINGTON — Blistering summer temperatures are already hard enough on Arizona, but they could become even more of a challenge if the state is required to meet carbon emission reductions proposed by ...

SAN FRANCISCO – After determining several challenges of federal requirements to help Arizona clean up emissions in national parks were raised too late, the Ninth Circuit on Monday OK’d the U.S.

The state’s move to expand a gas plant without review sets a dangerous precedent, according to environmentalists. A fight over a new gas plant in Arizona is exposing the challenges of greening the ...

FLAGSTAFF, Ariz. (AP) — Arizona would be tasked with coming up with a plan to cut carbon dioxide emissions by about half under a proposal released Monday by the U.S. Environmental Protection Agency.

Agencies and energy providers in Arizona are taking action to slow the increase in greenhouse gas emissions throughout the state. Benjamin Grumbles, director of Arizona Department of Environmental ...

PHOENIX — The 2020 Greenhouse Gas Emissions Inventory showed Phoenix had a 14% decrease in community-wide GHG emissions compared to 2012, the city announced this week. This is in lieu of the city’s ...

PHOENIX — The U.S. Environmental Protection Agency announced on Thursday that it has awarded over $1.6 million in Diesel Emission Reduction Act grants to public and private partners in Arizona. The $1 ...

Car emissions laws in Arizona may become less stringent if the Arizona Department of Environmental Quality decides to change the standard at a public hearing Tuesday. The Clean Car Program is the ...

Although older Arizona residents and those with underlying health conditions are still being told to stay home due to the risk of COVID-19, they still must leave their homes for emissions testing to ...