Tucson, Arizona, opens new compost facility

The city has also partnered with the University of Arizona to offer a commercial pickup program.

U.S. Cities Are Underestimating Their Greenhouse Gas Emissions

The errors could make it more difficult for cities to meet goals for reducing their planet-warming footprint

Analysis of Alaskan Tree Rings can Help Fine-Tune Future Climate Predictions

University of Arizona researchers read between the lines of tree rings to reconstruct exactly what happened in Alaska the year that the Laki Volcano erupted half a world away in Iceland. What they learned can help fine-tune future climate predictions.

Many Overheated Forests May Soon Release More Carbon Than They Absorb

New research suggests that, sooner than expected, trees may become carbon sources rather than carbon sinks, as a feedback loop of rising temperatures drives them to release more greenhouse gases.

Global Warming Gathers Pace

The world is getting hotter: during three recent years, the total amount of global warming jumped by a fourth. And cities are getting hotter, too.

Could agrivoltaics feed our demand for clean energy?

Agrivoltaics could result in more food, more energy, lower water demand, lower carbon emissions, and more prosperous rural communities, says an Oregon State University researcher. He plans to build a farm to prove the point.