The U.S. has reopened a border crossing in Arizona to cattle from Mexico as part of a broader effort by the Trump administration to reduce near-record-high beef prices.

Louisiana is the latest state to redefine natural gas as green energy, even though it’s a fossil fuel that emits planet-warming greenhouse gases.

It was 160 years ago that enslaved people in Galveston, Texas, learned they had been freed — after Civil War's end and two years after President Abraham Lincoln’s Emancipation Proclamation.

Many Americans are celebrating Juneteenth, marking the day in 1865 when the last enslaved people in the U.S. learned they were free.

Wildfires, floods and soaring temperatures have made climate change real to many Americans.

Conflicts over water are as old as history itself, but the massive Google data centers on the edge of a small Oregon town represent an emerging 21st century concern.