Nearly 1,200 saguaros toppled in southern Arizona
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The National Park Service says about 1,200 saguaros either toppled over or had their arms or tops severed during a monsoon storm last month. The "blowdown" event happened on Aug. 22, causing many saguaros to be uprooted or snap along their trunks. NPS says hundreds of saguaros are still standing and remains healthy.

Watch: NOAA scientists find mysterious, shiny orb-like object on seafloor

Video from NOAA shows the vessel’s remotely operated arm carefully "tickle" the object before picking it up and sucking it into a vacuum-like tube.

Congressional watchdog says U.S.-Mexico border wall construction caused harm

Trump and his supporters have argued that a strong physical barrier along the border is necessary to keep out drugs and people trying to enter the U.S. illegally.

Biden administration ends remaining oil and gas leases in Alaska’s Arctic Wildlife Refuge

Alaska political leaders have pushed to allow oil and gas drilling in the refuge in part because of its economic impact on Indigenous communities in an area with fewer jobs.

Air pollution from wildfires linked to dementia cases, study says

Particulate pollution comes from several sources, not just wildfires, but the study identified particulates from wildfires and agriculture as the sources linked to dementia cases.

E. coli found in water near Grand Canyon's Phantom Ranch

On Sept. 6, the advisory was lifted after officials said testing confirmed that the water is safe to drink and cook with.

Water conservation measures announced for Grand Canyon National Park

Grand Canyon National Park announced Tuesday that it is reimplementing mandatory water conservation measures again for the South Rim due to diminished supplies.

Grand Canyon urges people to conserve water
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People living at the Grand Canyon and visitors are being asked to conserve water. The National Park Service says it's unable to pump water right now from Roaring Springs to the South rim because of diminished supplies and difficulties treating the water. Hikers are being urged to carry their own water or treat water themselves.

NASA releases first images from pollution-monitoring satellite in space

NASA has shared this week the first images from TEMPO, the agency’s first space-based instrument designed to continuously measure air quality over North America, and do so with the resolution of a few square miles.

Silicon Valley billionaires want to build a new city in rural California

Silicon Valley billionaires behind a secretive $800 million land-buying spree in Northern California have finally released some details about their plans for a new green city, but they still must win over skeptical voters and local leaders.

Why fall season should actually begin on September 1

The calendar says autumn begins on Sept. 22, but 'climatological' or 'meteorological' fall starts 3 weeks earlier.

Arizona farmers look for ways to conserve water
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The Valley is heating up again this week with many daily highs above 110. Farmers at a food expo in Mesa say they're working to farm sustainably by conserving water so they sustain the crop through Arizona's summer heat. FOX 10's Irene Snyder has the story.