On the first day of the United Nations Ocean Conference in Nice, France, the findings of a new study have revealed that ocean acidification (OA) — which damages ecosystems like coral reefs — is not only getting worse, but crossed its “planetary boundary” roughly five years ago.
The findings came as a surprise, as scientists in a report published last year said OA was “approaching a critical threshold,” but had not yet crossed the boundary.
The nine defined planetary boundaries in which Earth can operate safely include climate change, freshwater use and OA.
“OA is the term given to the long-term shift of marine carbonate chemistry resulting primarily from the uptake of carbon dioxide (CO2) by the oceans, leading to an increase in ocean acidity and a decrease in carbonate ion (CO32−) concentration,” the authors of the study wrote. “OA can severely affect marine organisms through its direct impact on physiology, growth, survival and reproduction.”
The researchers pointed out that ocean conditions vary widely across the world, with OA levels in tropical regions over two times as high as in polar regions.
“Looking across different areas of the world, the polar regions show the biggest changes in ocean acidification at the surface. Meanwhile, in deeper waters, the largest changes are happening in areas just outside the poles and in the upwelling regions along the west coast of North America and near the equator,” said lead author of the report Helen Findlay, a professor at the United Kingdom’s Plymouth Marine Laboratory (PML) and chair of the North-East Atlantic Ocean Acidification Hub, in a press release from PML.
The study, led by PML, the National Oceanic and Atmospheric Administration in the United States and Oregon State University’s Cooperative Institute for Marine Resources Studies (CIMERS), said OA’s threat to marine ecosystems globally is much more widespread than previously believed.
The research team used the most recent chemical and physical measurements of the upper ocean, along with studies of marine life and advanced computer models to conclude that by 2020, average ocean conditions globally were already very near — and in some regions had already surpassed — the OA “danger zone.”
“Most ocean life doesn’t just live at the surface – the waters below are home to many more different types of plants and animals. Since these deeper waters are changing so much, the impacts of ocean acidification could be far worse than we thought. This has huge implications for important underwater ecosystems like tropical and even deep-sea coral reefs that provide essential habitats and nursing refuge for many species, in addition to the impacts being felt on bottom-dwelling creatures like crabs, sea stars, and other shellfish such as mussels and oysters,” Findlay explained.
Professor Helen Findlay working in the laboratory to investigate the impacts of climate change and ocean acidification on marine organisms and ecosystem functioning. Plymouth Marine Laboratory
The team discovered that roughly 60 percent of deeper ocean waters — down to approximately 656 feet — had crossed the planetary boundary for OA — compared with 40 percent at the surface. The increase in acidification has enormous implications for the survival rates of many sea creatures, particularly those who build their skeletons or shells from calcium carbonate.
Some subtropical and tropical coral reefs have already lost 43 percent of suitable habitats, while pteropods, a main food web species in the polar regions — also known as “sea butterflies” — have lost as much as 61 percent of their habitat. Additionally, 13 percent of the habitats of coastal shellfish species have been lost worldwide.
Based on the findings, the scientists recommended that a change be made to the previous safety limit of a 10 percent deviation from pre-industrial levels being harmful to ocean ecosystems, as the entire surface of the ocean had already exceeded the stricter limit by about the year 2000.
“Ocean acidification isn’t just an environmental crisis – it’s a ticking time bomb for marine ecosystems and coastal economies. As our seas increase in acidity, we’re witnessing the loss of critical habitats that countless marine species depend on and this, in turn, has major societal and economic implications.” said Steve Widdicombe, a professor at PML who is co-chair of the Global Ocean Acidification Observing Network, one of the focuses of the UN’s sustainable development goal of addressing and minimizing the effects of OA.
“From the coral reefs that support tourism to the shellfish industries that sustain coastal communities, we’re gambling with both biodiversity and billions in economic value every day that action is delayed,” Widdicombe added.
The authors of the study suggested conservation measures should be directed toward to species and regions that are most vulnerable to acidification. They also emphasized the importance of suitable management measures or protection of areas that are the least compromised by acidification to ensure their longevity.
The newly identified subsurface water impacts highlight a pressing need to safeguard mid-water habitats and their marine life. The researchers stressed the importance of improved approaches to addressing OA, as well as other ocean pressures, to better support stronger ecosystem resilience.
“This report makes it clear: we are running out of time and what we do – or fail to do – now is already determining our future,” said Jessie Turner, director of the International Alliance to Combat Ocean Acidification, who was not part of the study, as The Guardian reported. “We are coming to terms with an existential threat while grappling with the difficult reality that much suitable habitat for key species has already been lost. It’s clear that governments can no longer afford to overlook acidification in mainstream policy agendas.”
The study, “Ocean Acidification: Another Planetary Boundary Crossed,” was published in the journal Global Change Biology.
TOMORROW
Join the launch of the #COP30 Virtual Ocean Pavilion during #UNOC3!
10 June |
10–11 AM CEST |
Zoom
Join via Zoom here: us02web.zoom.us/j/8955059069…— Plymouth Marine Laboratory (@plymouthmarine.bsky.social) June 9, 2025 at 2:11 PM
The post ‘Ticking Time Bomb’ of Ocean Acidification Has Already Crossed Planetary Boundary, Threatening Marine Ecosystems: Study appeared first on EcoWatch.
https://www.ecowatch.com/ocean-acidification-planetary-boundary.html
This week’s quote is a Somali proverb: “Be a mountain or lean on one.”
Earth911 inspirations. Post them, share your desire to help people think of the planet first, every day. Click to get a larger image.
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https://earth911.com/inspire/earth911-inspiration-be-a-mountain/
Ballet flats have long been a staple in my wardrobe, but in the past few years have experienced a significant resurgence — and for good reason. The right pair can be practical, versatile, and oh so chic through days at work, with family, or out for the evening. But finding that “just right” set that’s well-crafted and sustainably made can be a whole other story. That’s why this sustainable flats guide exists.
Comfort, style, sustainability, and longevity are a lot to ask in a shoe, but I don’t believe it’s too much. It just takes some extra digging. And thankfully, I’ve done that digging for you. Because I get it! I want a flat that looks beautiful. I want a flat that’s made responsibly in line with my values. I want a shoe I can actually wear for my life. And I want that shoe to be worth the investment — it has to last. That’s why I vetted through dozens of brands to create this curated list of flats.
What Makes a Flat More Sustainable?
Material Sourcing
Footwear is a tricky category when it comes to sustainable fashion because we ask a lot of our shoes. We wear them in rain or sunshine, paved paths and cobblestone, day in and day out for years. And through it all, they have to remain beautiful. Because when they’re unwearable, there’s not much left to do with them: there is no viable footwear recycling today. Anywhere that calls it “shoe recycling” is really repurposing that footwear. But once it can no longer be worn, it’s simply trash.
In other words, our shoes need to be incredibly durable, even though the most durable materials don’t always come with the lightest footprint. In footwear, when we talk about durability, we usually rely on leather or high-performance synthetic materials. Leather can hold up with many years of wear, getting more beautiful with wear, and is easy to repair when needed. Synthetic materials are also durable, particularly for withstanding the elements like snow and rain.
But sourcing these materials conventionally is highly polluting — so how can we source these materials better?
For synthetics, we have recycled options. Today, that’s largely recycling from plastic bottles, which isn’t without it’s controversies, but there is much innovation happening in the industry around true textile-to-textile recycling.
For leather, I look for:
- Vegetable-tanned (rather than chromium tanned)
- Locally-sourced leather (more traceability), and/or
- Leather Working Group certified leather, which covers responsible management of water, energy, and waste; safe chemical management, traceability of the raw material, and occupational safety for workers.
Notably, there is no certification for animal welfare, so these are imperfect systems. But the alternative is footwear made from synthetic plastic materials or vegan leather alternatives that don’t yet meet the same durability standards as leather. Sustainability within today’s constraints requires trade-offs.
That said, there is always secondhand leather — by buying shoes secondhand you can access the quality of leather without adding further demand for the material.
Responsible Manufacturing
When considering responsible production practices, I look for first and foremost: transparency. Seeing what the brand shares about their material sourcing, their process, and who made their shoes where. And then I look at the details of that process: were the shoes made locally or within a geographic region? How are the workers paid and treated — and under which conditions do they work?
And, sometimes a brand employs an out-of-the-box approach to manufacturing entirely. There are a few slow fashion footwear brands challenging the traditional fashion system of ordering in mass quantities before demand is assessed —which inevitably leads to overproduction. These brands use an “on demand” model instead, producing their shoes only after they’ve been ordered. This reduces the risk of overproduction (i.e. producing more than what gets sold) while also encouraging more thoughtful consumption. You can’t impulse buy a pair of Mary Janes that you have to wait 8 weeks for.
Wearable and Beautiful
The most perfectly environmentally sustainable flat in the world is useless if no one wants to wear it. And as I mentioned earlier, footwear cannot be recycled into new footwear at the end of its life, so we want our shoes to last a really long time. That means they need to be design forward and comfortable, too.
My Top Picks for More Sustainable and Ethical Flats
Keeping all of that in mind, these more sustainable flats brands meet this criteria, albeit to various extents. Some err more on comfort while some more on style. Some have admirable levels of transparency and social impact, while other brands have more of a focus on their ecological impact. I’ve included descriptions alongside each brand as well as a summary of conscious qualities so you can find a brand that meets your priorities best. And, of course, a price range so you know what makes sense for your budget as well.
Some that this guide includes affiliate links which means we may earn a commission if you shop through these links. As always, brands featured in shopping guides are brands that meet our strict sustainability criteria that we think you’ll love.
1. ALOHAS
Spanish brand ALOHAS flips the typical fashion production system on its head with its on-demand model.
Instead of overproducing thousands of shoes to later discount them, ALOHAS does the exact opposite. Its newest styles are available for pre-order at a discount of 30%, so the footwear brand can more accurately forecast demand. Then the shoes — like their flats — are primarily made by local artisans in Spain and Portugal. The brand regularly shows the behind the scenes of their production on their social media.
Conscious Qualities: On-Demand Production, Locally Made
Size Range: EU 35-42 (US 5-11)
Price Range: $195-$225
2. Rothy’s
If you’re looking for flats for all-day wear at work or running errands, Rothy’s is my recommendation with their cushy insoles. The brand makes their more sustainable flats from recycled plastic bottles, as well as materials like hemp and merino wool, but they still look sleek enough for the office.
While I might not wear Rothy’s flats to a fashion event (I prefer smooth leather for more elevated occasions), they are more than stylish enough to wear to most of my real-life scenarios. My favorite part about Rothy’s, though, is that they are machine washable.
Materials: Recycled & Natural Materials, Owns One Factory (undisclosed percentage of production)
Size Range: US 5-13
Price Range: $99-$165
3. Vivaia
Vivaia has the most adorable sustainable Mary Janes made from recycled plastic bottles. The adjustable straps and arch support make Vivaia’s Mary Janes suitable for all-day comfort, even if your feet are typically prone to slipping out of flats.
This vegan footwear brand also makes square-toe and pointed-toe flats for a more elevated look. And of the several recycled plastic bottle footwear brands on the market today, Vivaia tends to have the most elevated designs in my opinion.
Conscious Qualities: Vegan, Recycled Materials
Size Range: US 5-11
Price: $97 – $116
4. The RealReal
The RealReal is an authenticated luxury resale platform with contemporary, designer, and high-end luxury brands. Depending on your priorities you can find shoes in anywhere from pristine condition (but higher priced)) to “fair” or even “as is” for the largest discount from full price.
You don’t always have as many options aesthetically when shopping more sustainably, so I like to go to The RealReal when I’m looking for specific styles. I was recently looking for Mary Janes with feminine detailing and came across Larroude Flats on The RealReal, where I purchased a pair of neutral scalloped accent flats. (Pictured here!)
Conscious Qualities: Secondhand
Size Range: US 3.5-14
Price Range: $9+
5. ESSĒN
ESSĒN elegant, minimalist footwear is artisan handcrafted from Leather Working Group-certified leather in solar-powered facilities in Italy, Portugal, and Spain. Each shoe also comes with a product passport where you can view the step-by-step journey that product took through the brand’s supply chain from raw material to manufacturing to packaging and distribution.
Beyond transparency and responsible manufacturing, ESSĒN’s slow fashion business model prevents overproduction by operating on a made to order basis. Meaning while sizes and styles are predefined, the shoes are only produced after they’ve been ordered.
Conscious Qualities: LWG Certified, Supply Chain Transparency, On Demand Production
Size Range: EU 35-44 (US 4-13)
Price Range: $295-$450
6. Allbirds
Another comfort-first footwear option besides Rothy’s is Allbirds. The brand creates lightweight, super smooth and breathable flats from tree fibers, aptly called “Tree Breezers”. The (washable) shoes are also soft enough to wear without socks.
The Allbirds Tree Breezers are far more comfortable than typical flats, though I find that the Rothy’s are slightly comfier.
Conscious Qualities: Natural materials (FSC-Certified eucalyptus, castor mean oil, sugarcane EVA)
Size Range: US 5-11
Price Range: $105-$125
7. Darzah
Fair trade certified by Fair Trade Federation, Darzah’s ethical flats are entirely hand-embroidered and handcrafted in Palestine from locally sourced leather.
The tatreez flats from this nonprofit are embroidered by refugee and low-income women artisans in the West Bank with this traditional Palestinian techniques.
Conscious Qualities: Sustains Heritage Crafts, Fair Trade Certified
Size Range: EU 36-41 (US 6-10)
Price Range: $199 – $209
8. Nisolo
If you’re seeking a quality pair of classic leather flats ideal for your capsule wardrobe, Nisolo is a strong pick. Nisolo’s flats are handcrafted by artisans using leather sourced from a Leather Working Group certified tannery.
I’ve been wearing my Nisolo shoes for many years and can attest to their quality and durability.
That said, the brand has recently turned over to new ownership and now has significantly less information about their sustainability and ethics in their supply chain. I will be keeping a close eye on this brand to see if it continues to uphold the values Nisolo has long held.
Conscious Qualities: LWG-Certified, Artisan Handcrafted
Size Range: US 5-11
Price: $138 – $198
For More Slow Fashion Content:
You May Also Want to Check Out:
The Best Affordable Ethical Fashion Brands
Responsibly Made Vegan Shoe Brands
15 Brands with Ethical Boots to Rock this Fall (and Beyond)
The post 8 Best Ethical & Sustainable Flats That Are Effortlessly Chic appeared first on Conscious Life & Style.
https://www.consciouslifeandstyle.com/sustainable-ethical-flats/?utm_source=rss&utm_medium=rss&utm_campaign=sustainable-ethical-flats
Today’s quote is from writer, businessman, and conservationist Simon M. Lamb. In his book, Junglenomics: Nature’s Solutions to the World Environment Crisis, he suggests that nature provides solutions to help us reform our environmentally destructive economic practices.
Lamb writes, “As in nature, so in economics — what provides survives.”
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.
Editor’s Note: This poster was originally published on March 27, 2020.
The post Earth911 Inspiration: What Provides Survives — Simon M. Lamb appeared first on Earth911.
https://earth911.com/inspire/earth911-inspiration-what-provides-survives-simon-m-lamb/
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