How is air quality measured?

As smoky air from Canada’s wildfires shrouds broad swaths of the U.S., here are seven facts you should know about measuring air quality.

Oak Flat Timeline: Native American vs. pro-mining interests

Resolution Copper, a subsidiary of international mining giants Rio Tinto and BHP, wants to develop the large deposit of copper ore deep under Oak Flat into a massive mine. The nonprofit Apache Stronghold considers the land sacred and says it should be preserved for religious ceremonies.

Algae warning issued for Bartlett Lake

If you're headed to Bartlett Lake this weekend, don't get in the water. Tonto National Forest officials say blue green algae has been found in the lake. The algae can produce toxins that are dangerous for people and pets. Officials advise to not go swimming in the lake, and to not wash or cook with lake water.