LETTERS TO THE EDITOR: Chronicle readers comment on Prop 45’s impact on CEQA, opposing Menlo Park towers, choosing Sen. Scott Wiener’s leadership and a heartbreaking ICE-related photo.

Santa Rosa city officials have sided with neighbors who organized to save “Rosie,” a towering redwood tree slated to be cut down because it had grown into a sidewalk, making it impassable.

YouTube video by CTV News

It’s been a blistering year. A record-hot September doesn’t bode well for the rest of it

Dubbed internally as “Operation Safe California,” the Examiner reported, the 45-day enforcement began several days ago in the San Diego area.

The Sierra Club is suing the city of San Francisco’s water department, claiming officials are manipulating water data to justify bigger water grabs for the city — and inflating customer rates.

California is denouncing Trump’s plan to repeal the government’s “Roadless Rule” and allow roadbuilding, logging and possibly oil drilling on nearly 45 million acres of national forest land.

Micro aircraft used to help guide birds to Spanish stopover as part of efforts to create sustaining migratory population

Chinstrap penguins on Zavodovski Island in Antarctica down by two-thirds since 2011, probably due to climate crisis

The humane myth of catch and release fishing.

He’s calling it an Obamacare “refund,” but it’s nothing of the sort.

Inquest under way into why President Lula’s success in curbing Amazon deforestation has not led to success at polls

Whale researchers spotted the 30-year-old female orca carrying a tiny carcass through the Strait of Juan de Fuca on Saturday.

A rare 200-tree American chestnut grove in West Virginia may be cleared for data-center development, but the project denies the site is on its land.

The Trump administration on Monday plans to release new fuel economy standards that would relax regulatory requirements for automakers to control pollution from gasoline-powered cars and light trucks

But There is Another Path, One That Embraces an Ecology of Kinship

Women ‘set back by 50 years’ as Bolivia, Chile, Argentina and Peru debate tougher penalties for false reports of sexual assaults, despite such cases being rare

A proposed federal rule change could open millions of acres across some of Nevada's most pristine landscapes to road building and commercial logging, while another change could substantially expand…

The US president has taken credit for far-right victories across Latin America, but those wins have had more to do with fears of gang crime than his meddling, says journalist Steve Bloomfield

The Republican-controlled Senate will soon formally announce a legislative “permitting reform” deal to speed the development of AI data centers and energy infrastructure. We expect the Senate will the...

Dreams of a lithium boom at California’s Salton Sea keep receding into the dusty desert horizon.

The ruling dealt a setback to the Trump administration’s plans for hundreds of miles of barriers that have drawn local opposition.

A federal judge on Friday barred the Trump administration from building a US-Mexico border barrier through Big Bend National Park in Texas while courts consider ​an environmental lawsuit challenging the project.

Democracy Docket mapped the affected zip codes.

Researchers listening off the Caribbean island of Dominica found variations in the mammals’ audible clicks when marine traffic was close

"This is 100% a sign of success."

Toxic algal blooms are sickening sea lions along California's coast, prompting hundreds of reports and dozens of rescue efforts.

Gov. Gavin Newsom signed a bill that restores California's Wildlife Coexistence Program in an effort to resolve rising conflicts with wolves, bears and mountain lions.

Human activities continue eroding the planet’s stability, resilience and life-support functions, the third edition of the Planetary Health Check released in September warns. The “scary” part of the 20...

The world’s coral reefs are losing both hard coral cover and, just as critically, the time they need to recover between increasingly frequent marine heat waves, according to the most comprehensive glo...

OTAGO PENINSULA, Aotearoa New Zealand — Sandfly Bay was long a key nesting area for yellow-eyed penguins (Megadyptes antipodes), noisy, pink-footed birds that spend long days foraging at sea. But this...

BANGKOK — Over the course of 2025, the Mekong countries of Cambodia, Laos, Myanmar, Thailand and Vietnam lost a combined 746,168 hectares (1.8 million acres) of tree cover, an area roughly equivalent ...

El Niño is a climate pattern that is declared when monthly sea surface temperatures in the central and eastern tropical Pacific Ocean are measured above normal, for at least five consecutive overlappi...

Food and Agriculture Organization urges governments to make forest restoration a national priority

Award-winning novelist celebrates late partner’s love of birds with gift to establish the Graeme Gibson chair in avian biology