Arizona's political leaders warned any action to prevent climate change would cost too much. Get ready to spend because climate change is here and taking 592,000 acre feet a year of water from the state. Read more»

The climate change and health care bill signed into law this week will lower U.S. carbon emissions by a gigaton by 2030, a new analysis from the Department of Energy said, further cementing claims already made about the the bill's clean energy programs. Read more»

Proponents of massive projects to bring water to the West argue that they could stabilize western cities for decades to come, while detractors counter the only sustainable solution is consume less water - but most of these projects are ideas from a bygone era. Read more»

La contaminación del aire en el área metro de Tucson está en niveles dañinos el miércoles. Los residentes deben limitar las actividades al aire libre, según el Condado Pima. Read more»

Air pollution in the Tucson metro area reached harmful levels on Wednesday, with high concentrations of ozone over the city. Residents should limit outdoor activities, Pima County officials said. Read more»

As the historic drought in the U.S. West continues to push reservoir levels down to new lows, the federal government on Tuesday ordered Arizona and Nevada to cut the amount of water they draw from the Colorado River. Read more»

Arizona will face a drastic cut in the amount of Colorado River water delivered from Lake Mead after federal officials announced Tuesday that the state will lose 21% of its annual allotment next year. Read more»

In June, Bureau of Reclamation Commissioner Camille Touton told the U.S. Senate that states using the Colorado River Basin for their water supply have 60 days to create an emergency plan to cut their water usage by 2 to 4 million acre-feet. Read more»

Las partículas que flotan en el aire alrededor del Condado Pima alcanzaron niveles tan altos el lunes que el Departamento de Calidad Ambiental emitió un "aviso de alta contaminación," recomendando a las personas en riesgo que reduzcan sus actividades al aire libre. Read more»

Particulates floating in the air around Pima County reached such high levels Monday that the Department of Environmental Quality issued an "high pollution advisory," recommending at-risk individuals reduce their outdoor activities. Read more»

The $370 billion climate, energy and health care bill includes incentives to expand renewable energy and electric vehicles - but there’s a catch, and it could end up making it difficult for most EVs to qualify for the new incentive. Read more»

Amid global climate change and a chronic shortage of affordable housing, Arizona construction companies and nonprofits are taking innovative steps to make homes more energy efficient and environmentally sustainable. Read more»

In theory, summarizing risk information for flooding, hurricanes and even wildfires should help homebuyers and renters make more informed housing choices, but surveys show it isn’t working that way, at least not yet. Read more»

The city of Tucson only has five remaining neighborhood recycling centers, after closing two last month that had been plagued by illegal dumping. Read more»

Anglers should limit their consumption of catfish from Patagonia Lake because of elevated mercury levels. State officials said adults shouldn't eat more than 2.5 ounces per week of fish from the Southern Arizona lake, while children shouldn't eat more than 2 ounces per month Read more»