Tucson may forego some water to help keep Lake Mead level up

Tucson signaled it may forego part of its allotment of Colorado River water delivered by the Central Arizona Project aqueduct in order to help forestall a shortage declaration for Lake Mead that would trigger mandatory reductions.

Cleaner air leads to more hurricanes in the Atlantic, study finds

A new study links how many hurricanes form worldwide to air pollution levels. Wednesday's study from the National Oceanic and Atmospheric Administration says cleaner air in Europe and the United States is helping trigger a dramatic increase in the number of Atlantic hurricanes.