Climate Change

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tissues and medication
If you’ve been thinking that this year’s allergy season seems to be worse right now, that's probably because it is. And the culprit is climate change.
Mar. 29, 2022
summer cactus
Record high temperatures in the Valley this weekend will be met with an abrupt shift in weather patterns early next week.
Mar. 25, 2022
Experts have long expressed concern about the feedback loop between a warming climate and greenhouse gases released from melting permafrost. Now a new study suggests mountain permafrost might melt even faster than frozen ground in northern climes.
Mar. 25, 2022
Colorado River
The chairwoman of the Colorado River Indian Tribes is in Washington, D.C., this week to testify for a bill that would allow her tribe to lease its water to other parts of Arizona.
Mar. 22, 2022
U.S. government forecasters see a hot spring for much of the nation with drought in the West likely deepening. The West is in the midst of a record-shattering megadrought, and forecasters see it continuing.
Mar. 18, 2022
Lake Powell
An important Colorado River reservoir has fallen below a level that federal water managers were trying to maintain for hydropower generation.
Mar. 16, 2022
Bureau of Land Management
The Bureau of Land Management is seeking public input on a proposed 500-kilovolt transmission line that would cross the desert about 60 miles west of Phoenix.
Mar. 15, 2022
Phoenix Zoo
One of the big challenges to a carbon-free grid will be to replace gas vehicles with electric. The Phoenix Zoo has built some necessary infrastructure to help with that transition. A recent study at Arizona State University found that building a clean energy grid will require a lot of charging stations.
Mar. 11, 2022
Navajo Nation president's office
A company owned by the Navajo Nation is investing in a company that will take over the San-Juan Generating Station to put in technology to capture carbon dioxide emissions.
Mar. 7, 2022
parked scooters
Phoenix leaders recently voted to allow electric bikes on all city streets and agreed to extend a downtown pilot program for electric scooters. Razor and Spin will continue to rent e-scooters downtown for another year.
Mar. 3, 2022
electric motorcycles
Government leaders in Hermosillo, the capital of neighboring Sonora, say they want to tackle the causes and effects of climate change in the extremely hot city. One of those efforts is replacing police patrols cars with electric vehicles.
Mar. 3, 2022
A sign pointing to the emergency department at an Arizona hospital
The effects of extreme heat on physical illness and death are well-known. But most studies of its mental health effects are far more limited and regional. New research takes a wider view.
Feb. 24, 2022
Grand canyon interior
A new survey conducted by Colorado College has found strong support in the Rocky Mountain region for conservation efforts. Three-fourths of voters would support conserving 30% of America’s lands within the next decade.
Feb. 22, 2022
Cactus ferruginous pygmy owl
The U.S. Fish and Wildlife Service is proposing to list a tiny desert owl as a threatened species.
Feb. 18, 2022
La Sauceda theme park
The vast majority of residents in the Sonoran capital Hermosillo want to see renovations at an abandoned theme park and a nearby wetland where activists have been pushing for restoration.
Feb. 11, 2022
charging station
A team of ASU researchers with the College of Global Futures has taken an in-depth look at how Arizona might cut fossil fuel emissions to zero.
Feb. 8, 2022
Border wall
The state brought the suit last April, arguing the Biden administration did not consider the environmental effects of various policies.
Feb. 8, 2022
desert tortoise
The U.S. Fish and Wildlife Service says after conducting a scientific review, it will not list the Sonoran desert tortoise under the Endangered Species Act.
Feb. 8, 2022
Aspens change color in Flagstaff
A non-native insect is threatening aspen trees in northern Arizona. The insect is called an oystershell scale, and it’s about the size of a grain of rice.
More Arizona science news
Feb. 6, 2022
man lugging belongings
Phoenix expects to have a single coordinated heat response plan fully operational by May 1. The citywide plan will focus heavily on several blocks around the Human Services Campus between downtown and the state Capitol complex. It’s where hundreds of people are living in tents.
Feb. 3, 2022


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