Future conservation efforts are highly uncertain.
But getting a new rule to replace the controversial "Waters of the U.S." will take a long time — if it survives court challenges.
The Bureau of Reclamation's plan may spark a broader effort to make it as economical to leave effluent in rivers as to take it out.
The seventh Southwestern jaguar documented since 1996 doesn't quell the dispute over their significance.
By 2100, river flows could drop up to 55 percent below 20th-century norms, the new study found.
That's because the Central Arizona Project would see a big savings in its energy costs to pump water.
Company says it will move forward with a contribution of $500,000 to the Marana Unified School District Foundation.
Federal officials say the lesser long-nosed bat has recovered well enough to remove it from the endangered species list.
Federal official clears up the confusion over that fact.
Local environmental quality officials were on "pins and needles" when the Trump administration slapped a freeze on EPA grants earlier this week.