The Gila River Indian Community Council in September approved plans to reclaim an 80- to 100-square-mile section of the Gila River and floodplain from invasive salt cedar, or tamarisk.
Removing invasive salt cedar reduces the risk of wildfires, but it also offers a chance to restore native plants and wildlife.
The pipeline leak that spilled sewage into Arizona’s Santa Cruz River is sealed, but another pollution problem persists — one many other American waterways share.
Contaminants of emerging concern, or CECs, are chemicals from drugs and personal care products that most wastewater treatment plants don’t filter out. Some, including estrogenic compounds from products like synthetic birth control, disrupt the hormones of aquatic wildlife, harming reproduction.