In a symptom of human development pushing native wildlife further outside their natural habitats, mountain lions living in the greater Los Angeles area have been changing the timing of their activities to avoid interactions with hikers, joggers, cyclists and other recreationists, according to a new study led by researchers at University of California, Davis (UC Davis).
The researchers found that mountain lions who lived in areas with more human recreation had shifted to become increasingly nocturnal compared with more remote-dwelling lions, who were primarily active around dawn and dusk, a press release from UC Davis said.
“People are increasingly enjoying recreating in nature, which is fantastic,” said lead author of the study Ellie Bolas, a UC Davis Ph.D. candidate in the Department of Wildlife, Fish and Conservation Biology, in the press release. “This flexibility we see in mountain lion activity is what allows us to share these natural areas together. Mountain lions are doing the work so that coexistence can happen.”
The authors said the findings offered a hopeful example of the coexistence of wildlife and humans in a large, densely populated area.
“Mountain lions prefer to avoid people, but in a metro area of more than 18 million people, natural areas inhabited by mountain lions and other wildlife are also heavily used by recreationists,” the press release said.
To find out if and in what ways mountain lions were shifting their activities in response to the recreationists, the research team monitored 22 lions’ movements in and around the Santa Monica Mountains from 2011 to 2018.
Biologists captured lions living inside the Santa Monica Mountains National Recreation Area and fitted them with GPS and accelerometer collars. They then analyzed the data, quantifying the area’s human recreational activity using a global database of activities tracked by GPS.
“These results are really important in that they show how humans may be affecting wildlife in less obvious ways than killing them with vehicles,” said Seth Riley, the park’s head of wildlife, in the press release. “The study also continues to drive home the amazing fact that a population of a large felid predator persists in one of the largest urban areas in the world. That would not be possible if mountain lions weren’t able to adjust to human activity in ways like this.”
The findings demonstrated that the highest recreational activity levels were in Griffith Park, while Los Padres National Forest and the Santa Susana Mountains had the least amount of activity.
“The least nocturnal mountain lion was female P13 in the central and western Santa Monica Mountains. Females, in general, were found to be more active closer to sunrise and during daylight hours as compared to males,” the press release said.

Female P13 was the least nocturnal mountain lion studied. National Park Service
The authors said the reason for that could be so female cats can avoid running into males, who pose a danger to them and their kittens.
Two male mountain lions occupying isolated natural areas with an abundance of trails, high recreation levels, surrounding freeways and intense development were the most nocturnal. Both lived in two of the most limited home ranges for adult males ever recorded. The most nocturnal lion in the study — P41 — lived in the small Verdugo Mountain Range, which spans several cities.

Male P41, the most nocturnal mountain lion in the study, who lived in the Verdugo Mountains near Los Angeles, an area with high levels of human recreation. National Park Service
The second most nocturnal of the lions was P22, who lived in Griffith Park and became famous for crossing two busy freeways when he was young. He continued to occupy the area until he was killed in 2022 at 12 years old — one of the most senior cats in the study.

P-22 was among the mountain lions of Los Angeles who shifted his activities to be more nocturnal. National Park Service
The study’s authors said the lions in the study show how mountain lions actively avoid humans when faced with increased activity, rather than habituating themselves to them.
The authors said that doesn’t mean mountain lions should have to do all the work. Humans can help protect them, as well as themselves, by remembering that they are likely to be active at dawn or dusk in populated areas, and be on the lookout for them when driving at night.
In the Los Angeles area, mountain lions face many challenges and dangers, including busy roads where they are often killed, fragmented habitat, exposure to rodenticide and low genetic diversity.
“Even something as innocuous as recreation can add to these other stressors we’re bringing into their lives, potentially by altering the amount of energy they have to expend for hunting and other needs,” Bolas said in the press release. “But we can feel a sense of optimism that they are flexible in the timing of their activity. Coexistence is happening, and it’s in large part because of what mountain lions are doing.”
The study, “Human recreation influences activity of a large carnivore in an urban landscape,” was published in the journal Biological Conservation.
The post ‘Coexistence Is Happening’: LA Mountain Lions Change Their Hours to Avoid Recreationists appeared first on EcoWatch.
https://www.ecowatch.com/mountain-lions-los-angeles-coexistence.html
Green Living
Earth911 Inspiration: Be True to the Earth — Edward Abbey
This week’s quote is from American novelist and pioneering environmentalist Edward Abbey: “I am not an atheist but an earthiest. Be true to the earth.”
Earth911 inspirations. Post them, share your desire to help people think of the planet first, every day. Click the poster to get a larger image.
This poster was originally published on January 31, 2020.
The post Earth911 Inspiration: Be True to the Earth — Edward Abbey appeared first on Earth911.
https://earth911.com/inspire/earth911-inspiration-be-true-to-the-earth-edward-abbey/
Green Living
10 Books to Counter Consumerism
We are constantly bombarded by messages that tell us we need more stuff to be happy. The average American household contains around 300,000 items. The average home size has roughly tripled since the 1950s, and we still rent self-storage units by the millions to hold the overflow.
If you are rethinking your relationship to consumer culture – whether by choice or necessity – we’ve rounded up a list of books to make breaking up with consumerism and easier to understand which of our purchases are really necessary.
(Amazon links are provided for convenience. Your local library and independent bookstore are excellent first stops.)
Empire of Things
by Frank Trentmann
Trentmann’s sweeping 2016 history follows material culture from late Ming China and Renaissance Italy through to today’s global supply chains. He shows that consumerism is not a recent American export but a centuries-long international phenomenon, one that has reshaped households, cities, and the planet.
Empire of Things is dense but never preachy, and it gives readers the long view needed to understand what we are actually pushing back against.
No Logo – 10th Anniversary Edition
by Naomi Klein
No Logo was a movement manifesto when it appeared in 1999, and its dissection of branding, sweatshop labor, and corporate cultural takeover reads as prescient now that nearly every screen on earth is an ad surface. To take the next step, pair this read with Klein’s more recent argument about capitalism and ecological collapse, How To Change Everything.
The Conscious Closet
by Elizabeth L. Cline
Cline first exposed the human and environmental costs of fast fashion in Overdressed (2012). The Conscious Closet is the practical follow-up: how to clean out, repair, swap, and rebuild a wardrobe without funding the industry that produces an estimated 92 million tons of textile waste each year. It is the most actionable book on this list for anyone with a closet.
The Myths of Happiness
by Sonja Lyubomirsky
Psychology professor Sonja Lyubomirsky brings the receipts. In The Myths of Happiness, she walks through decades of research showing that material milestones — the raise, the upgrade, the bigger house — produce short bursts of satisfaction that fade quickly. What actually sustains wellbeing is rarely for sale. A clarifying read for anyone tempted to outshop their way to contentment.
How to Do Nothing: Resisting the Attention Economy
by Jenny Odell
Waste is coming for our minds, too. Odell argues that our scarcest resource is attention — and that the platforms we use have turned it into the raw material of a trillion-dollar industry. How to Do Nothing is not a digital-detox manual; it is a case for reclaiming attention as a political act, with consequences for everything from bird-watching to civic life. More relevant in 2026 than when it was published in 2019.
Less Is More: How Degrowth Will Save the World
by Jason Hickel
Economic anthropologist Jason Hickel makes the case that endless GDP growth is incompatible with a livable planet, and that “green growth” is mostly a marketing exercise. Less Is More (2020) traces 500 years of capitalism and lays out what a degrowth economy could actually look like — one organized around human and ecological flourishing rather than perpetual expansion. The book has helped move degrowth from the margins of academia into the mainstream of the climate debate.
The Day the World Stops Shopping
by J.B. MacKinnon
Journalist J.B. MacKinnon designed The Day the World Stops Shopping (2021) as a thought experiment — what would happen if global consumption dropped by 25%? — and then watched the pandemic run a version of the experiment in real time. He travels from Namibian hunter-gatherer communities to American big-box retail, talking to economists, ecologists, and CEOs. The result is one of the most readable accounts of why we shop, why we cannot easily stop, and what we would gain if we did.
Consumed: The Need for Collective Change
by Aja Barber
Writer and consultant Aja Barber connects fashion, colonialism, and climate in Consumed (2021), a debut that has become a touchstone for the ethical fashion conversation. Where Cline writes as a practitioner, Barber writes as a systems critic, tracing the textile trade’s roots in slavery and racial inequality and asking readers to confront why we fill emotional gaps with purchases. Pointed, generous, and built to be read in two sittings.
Wasteland: The Secret World of Waste and the Urgent Search for a Cleaner Future
by Oliver Franklin-Wallis
If consumerism is the input, waste is the output we work hardest not to see. Award-winning journalist Oliver Franklin-Wallis follows that output across continents in Wasteland (2023) — from New Delhi’s landfills and Ghana’s secondhand clothing markets to nuclear storage sites and the corporate origins of curbside recycling. Named a Best Book of 2023 by The New Yorker, The Guardian, and Kirkus, it is essential reading for anyone who has ever wondered where “away” actually goes.
Fixation: How to Have Stuff Without Breaking the Planet
by Sandra Goldmark
Sandra Goldmark runs a pop-up repair shop in New York and serves as director of sustainability at Barnard College. Fixation (2020) is her plainspoken case for getting things fixed instead of replaced, and for building a circular economy where good design, reuse, and repair are the default. Her five-rule formula — borrowed in spirit from Michael Pollan — is the most quotable advice on this list: “Have good stuff. Not too much. Mostly reclaimed. Care for it. Pass it on.”
What You Can Do
Reading is a start, not a finish. A few next steps:
- Start at the library. Most of these titles are available through WorldCat or your local branch. Borrowing keeps a book in circulation and out of a landfill.
- Audit one category of stuff before adding to it. Pick clothes, kitchenware, or electronics. Inventory what you already own before the next purchase. Most of us own more than we remember.
- Find a repair option in your community. Take the time to locate repair, reuse, and donation outlets near you before tossing anything broken.
- Support right-to-repair policy. Several U.S. states have passed right-to-repair laws since 2023; the rest are weighing them. Individual purchasing choices matter more when manufacturers are required to make repair possible.
- Read one of these books and talk about it. Anti-consumption is harder alone. Book clubs, mutual-aid groups, and faith communities have all become surprising hubs for this work.
Editor’s Note: Originally authored by Gemma Alexander on June 18, 2020, this article was updated in May 2026.
The post 10 Books to Counter Consumerism appeared first on Earth911.
https://earth911.com/inspire/10-books-to-counter-consumerism/
Green Living
Best of Sustainability In Your Ear: EarthX CEO Peter Simek on Cultivating Bipartisan Climate Strategies
Subscribe to receive transcripts by email. Read along with this episode.
For 15 years, the Dallas-based climate conference the EarthX conference has created space where fossil fuel executives and environmental activists, Republican appropriations chairs and Democratic climate hawks, find common ground. The organization targets three core stakeholders: the corporate world, policymakers, and investors seeking startups where environmental solutions are baked into the bottom line. Peter Simek, EarthX’s CEO, explains how reframing climate action around shared values—stewardship, economic opportunity, and love of the land—unlocks support that crisis messaging alone cannot reach.
The doom story doesn’t sell, Simek explained. “We’re not motivated as a species by doomsday language. It puts people in fight-or-flight mode.” He points out how climate became an identity issue, tangled up in culture-war debates over hamburgers and gas-powered trucks, when the real conversation should center on clean air, clean water, and protecting the places we love. “The EPA and the Clean Air and Clean Water Act were passed during the Nixon administration,” he notes. “There are ways to message this that appeals across lines.”

Simek bets heavily on bottom-up action as EarthX works to build bridges. States, cities, and private capital often move faster than federal mandates, he argues, and they’re harder to reverse with a single executive order. Texas leads the nation in renewable energy deployment because wind and solar make bottom-line sense. “Even as there’s a policy turn against it, there’s still the driving reality that solar and wind are viable energy sources,” he says. A new event in 2026, the EarthX Institute, will focus on two policy priorities: nuclear energy, where bipartisan consensus is growing, and urban biodiversity.
Whether conversations at forums like EarthX translate into policy velocity that matches the pace of climate impacts remains to be seen. Simek says he stays focused on tracking downstream results, specifically the investments funded, the coalitions built, and the policies incubated from the local level up. “It’s about finding those ways in which there’s common sense, common ground, common values,” he says. “Elements to talking about nature and the environment that no one can really disagree with.”
Learn more about EarthX and its upcoming April 2026 conference at earthx.org.
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Editor’s Note: This episode originally aired on December 15, 2025.
The post Best of Sustainability In Your Ear: EarthX CEO Peter Simek on Cultivating Bipartisan Climate Strategies appeared first on Earth911.
https://earth911.com/podcast/sustainability-in-your-ear-earthx-ceo-peter-simek-on-cultivating-bipartisan-climate-strategies/
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