Police chiefs and cities are trying to block a proposed rule they say would allow unchecked home marijuana deliveries anywhere in California

An Arizona canyon famous for its blue-green waterfalls is reopening to tourists weeks after flooding caused extensive damage

Colorado is pointing to how its rules have reduced climate-changing methane leaks from oil fields as the Trump administration looks to roll back U.S. regulations

California researchers are trying to determine whether adding small amounts of seaweed to cattle feed will reduce the animals' emissions of a potent greenhouse gas.

The trade war with China is making life difficult for many farmers across Washington state

As small business owners in Hawaii and California start cleaning up after disaster, they'll find there's no one formula for recovery

The first full year of legal marijuana sales in Nevada exceeded expectations by 40 percent

As people return to work after summer vacations, it's a good time to make sure everyone in the company is sensitive to the need for computer security

Many Texas families still struggle to recover from Hurricane Harvey, but life has mostly returned to normal in many of the hardest-hit communities

Fate of measure regulating plastic straws at sit-down restaurants rests in California Gov. Jerry Brown's hands