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Australia’s Great Barrier Reef — the world’s largest coral reef system — has been under critical pressure in recent years, with warming sea surface temperatures leading to mass coral bleaching that threatens its unique biodiversity, ecology and stunning beauty.

Temperatures in the Great Barrier Reef have reached the hottest in more than 400 years, new research has found, presenting an “existential threat” to the UNESCO World Heritage Site.

“Mass coral bleaching on the Great Barrier Reef (GBR) in Australia between 2016 and 2024 was driven by high sea surface temperatures,” the authors of the study wrote. “Without urgent intervention, the iconic GBR is at risk of experiencing temperatures conducive to near-annual coral bleaching, with negative consequences for biodiversity and ecosystems services. A continuation on the current trajectory would further threaten the ecological function and outstanding universal value of one of Earth’s greatest natural wonders.”

The researchers reconstructed 400 years of Coral Sea summer surface temperatures and found that recent extreme ocean heat has resulted in mass coral bleaching of the GBR, a press release from University of Wollongong (UOW) said.

A field of bleached coral on the Great Barrier Reef. Ove Hoegh-Guldberg

The research team, led by Dr. Benjamin Henley — a professor and honorary fellow at University of Melbourne — used geochemical data from previously collected coral cores in the region for the temperature reconstructions. They also looked at sea surface temperature simulations with and without the effects of climate change using climate models and found that the rising temperatures were the result of the human-caused climate crisis.

“When I plotted the 2024 data point, I had to triple check my calculations – it was off the charts – far above the previous record high in 2017. I could almost not believe it. Tragically, mass coral bleaching has occurred yet again this year,” Henley said in the press release.

Five of the six warmest years on record coincide with the recent Coral Sea mass bleaching events. The sea experienced the highest temperatures in 400 years in 2017, 2020 and 2024, with this year being the warmest by a wide margin. The next warmest three years were in 2004, 2016 and 2022.

“Climate model analysis confirms that human influence on the climate system is responsible for the rapid warming in recent decades. This attribution, together with the recent ocean temperature extremes, post-1900 warming trend and observed mass coral bleaching, shows that the existential threat to the GBR ecosystem from anthropogenic climate change is now realized,” the authors of the study wrote.

Last week, the UNESCO World Heritage Committee decided not to list the Great Barrier Reef as in danger, but scientists have said that, based on the new evidence, the reef is definitely at risk.

“In the absence of rapid, coordinated and ambitious global action to combat climate change, we will likely witness the demise of one of Earth’s most spectacular natural wonders,” Henley said. “When you compile all of the evidence we have, it’s the inevitability of the impacts on the reef in the coming years that really gets to me.”

Professor Helen McGregor, co-author of the study and a geologist and climate change researcher with UOW’s Environmental Futures, said urgent action is necessary to prevent the devastation of one of Earth’s most important ecosystems.

“There is no ‘if, but or maybe’—the ocean temperatures during these bleaching events are unprecedented in the past four centuries,” McGregor said in the press release. “The Great Barrier Reef is facing catastrophe if anthropogenic climate change is not immediately addressed. The very corals that have lived for hundreds of years and that gave us the data for our study are themselves under serious threat.”

UOW co-authors Ariella Arzey and professor Helen McGregor. Michael Gray

Henley said tackling the climate crisis is the best way to help protect the GBR.

“We have many of the key solutions to stop climate change; what we need is a step change in the level of coordinated national and international action to transition to net zero,” Henley said. “We can never lose hope. Every fraction of a degree of warming we avoid will lead to a better future for the human and natural systems of our planet. We hope that our study equips policymakers with more evidence to pursue deeper cuts in greenhouse gas emissions internationally.”

The study, “Highest ocean heat in four centuries places Great Barrier Reef in danger,” was published in the journal Nature.

The post Warmest Sea Surface Temperatures in 400 Years Present ‘Existential Threat’ to Great Barrier Reef, Study Finds appeared first on EcoWatch.

https://www.ecowatch.com/ocean-temperatures-great-barrier-reef-threat.html

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Earth911 Inspiration: Love of Nature Transcends

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This week’s quote is from Jimmy Carter, the 39th president of the U.S., philanthropist, and environmental advocate: “Like music and art, love of nature is a common language that can transcend political or social boundaries.”

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.

Love of nature quote from Jimmy Carter

This poster was originally published on February 7, 2020.

The post Earth911 Inspiration: Love of Nature Transcends appeared first on Earth911.

https://earth911.com/inspire/earth911-inspiration-love-of-nature-transcends-jimmy-carter/

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Outdoor Projects You Can DIY for Almost Nothing

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It always strikes us as amusing how many DIY projects you see online that seem to require more time and more money than it would take to simply buy the thing they’re trying to DIY in the first place. Are we missing the point?

We think that doing things ourselves and taking back the power to create instead of simply consuming is absolutely vital to the green movement. But if you don’t already have the materials and spend a lot of money purchasing craft supplies, does it really make sense to DIY?

These eight projects are true do-it-yourself masterpieces. One-of-a-kind outdoor projects you can make for almost nothing, with supplies you most likely already have or can easily pick up second hand for a song. Roll up your sleeves and let’s get started!

1. Teapot/Teacup Bird Feeder

Idea and photo credit: Dinah Wulf, DIY Inspired

Do you have one of Grandma’s old tea sets lying around that doesn’t quite fit into the sleek modern aesthetic you’ve been cultivating? Put it to great use by feeding the birds in your area — in style.

Thrift stores are always awash in old china, so if you don’t already have the old tea set, consider going wild and spending a few bucks for this DIY delight. You’ll find blogger Dinah Wulf’s instructions for the teacup bird feeder at DIY Inspired.

Safety note: Use sturdy twine or cord — not chain — to hang the feeder. Birds can catch their toes in chain links, which causes serious injury. The National Audubon Society also recommends cleaning seed feeders every two weeks (more often in hot, humid weather) by scrubbing with soap and water and soaking in a 50-50 vinegar-water solution to prevent the spread of avian disease.

2. Gardening Tool Storage

DIY rake gardening holder
Idea and photo credit: Beth Logan, Artstuff Ltd.

What on earth do you do with those rusty-as-heck, old-school garden rakes hanging around your garage? Well, if you’re any sort of DIY genius, you press them into service as a gardening tool holder.

The original inspiration for this project came from Beth Logan at Artstuff Ltd., whose blog has since gone offline. For a current walkthrough, see the Repurposed Rake Tool Rack tutorial at DIY n Crafts (project #14 in their roundup of 25 ways to reuse old garden tools). The concept is embarrassingly simple — remove the rake handle, mount the head tines-out on a fence or garage wall, and use the tines themselves as hooks for trowels, gloves, and pruners — but eye-catching enough to make you look like a DIY pro.

3. Bottle Tree

A bottle tree, image courtesy of Felderrushing.blog

Do you like wine? No, I mean do you really like wine? Do you want a reason to drink more of it? And does your garden need a cute border? This sustainable, upcycled garden border may be just the project for you. You might have to expand your drinking list to include bottles of various shapes, sizes, and colors — but variety is the spice of life.

When friends ask how you managed to collect so many bottles, just laugh gaily and then distract them with your dainty teacup bird feeder. The bottle tree tradition itself runs deep — Mississippi garden writer Felder Rushing traces the practice back through African American Southern folk art and, by his own research, as far as ancient Egypt and Mesopotamia. See his bottle tree gallery and history for inspiration, or jump straight to his how-to guide for building one out of a cedar snag, rebar, or just about anything else.

4. Colorful Outdoor “Tiles”

Painted Patio Tiles
Idea and photo credit: Elsie Larson, A Beautiful Mess

If your backyard isn’t perfectly landscaped and manicured, with an impeccably tiled “outdoor living space,” don’t despair. You can use up all those half-empty paint cans and create a Pinterest-worthy colorful backdrop for evenings spent clustered around a fire or barbecue.

Pop a few coats of paint on cement tiles and you have a one-of-a-kind flooring solution. If you rent, the same effect could be achieved on a more temporary basis by letting the kids go wild with sidewalk chalk and create a mosaic masterpiece. Check out Elsie’s Painted Patio Tiles at A Beautiful Mess for the back story on this DIY idea. (Heads up: the original author noted she had to touch up the paint each spring in Missouri winters — a porch and patio floor enamel will hold up better than wall paint.)

5. Home Sweet Gnome

Idea and photo credit: Jennifer Pilcher, Snapguide

Okay, this one might be the least practical idea of the bunch, but that may be why I love it oh so much. If you have a stump in your backyard and you’re not willing or able to pay the truly insane amount it costs to have it ground down and removed, how about making it into a little gnome home? This is the perfect outdoor project if you have small children in your life.

Construct the trappings of a little house — door, windows, winding garden path — from found objects or natural materials, and affix them to the stump. Bonus points if you don’t tell the kids about this particular DIY project and allow them to simply stumble upon it one day in the garden. My mind would have been blown if I had come across one of these as a seven-year-old. For a step-by-step build, see this Gnome Tree Stump Home tutorial on Instructables.

Safety note: Don’t use an angle grinder to gouge windows or doors into a stump. Use a chisel and mallet for shallow detail work, or attach decorative pieces (driftwood, bark, polymer clay) to the outside instead.

6. Mosaic Stepping Stones from Broken China

Image courtesy of Gardening.org.

Every household eventually accumulates a small graveyard of chipped mugs, a single survivor from a four-piece dinner set, or a beloved teapot with a hairline crack. Rather than tossing them — broken ceramics generally aren’t accepted in curbside recycling — embed them in concrete stepping stones for a garden path that’s genuinely one of a kind.

This pairs beautifully with the teacup project above: any teacups that don’t make it past Project #1 (you will break a few) can come back as paving. The DIY mosaic stepping stones tutorial at Gardening.org walks through the full process — breaking ceramics safely inside a drop cloth, sizing pieces to half-inch to one-inch fragments, pressing them into wet concrete, and sealing the surface so sharp edges don’t cause injury underfoot. Basic mold options include an old cake pan, a plastic plant saucer, or a purpose-built stepping stone form from a craft store.

Safety note: Wear safety glasses and heavy gloves when breaking ceramics. Once cured, run a finger over the surface to check for protruding edges and file or sand any down before placing the stone where bare feet might land.

7. Vertical Pallet Herb Garden

Shipping pallets are one of the world’s most abundant near-free materials. Small businesses, garden centers, and feed stores often have stacks of them out back, and asking politely beats the alternative of seeing them landfilled. Mounted vertically against a sunny wall or fence, a pallet becomes a stacked planter that holds enough herbs to keep a kitchen in basil, thyme, parsley, and chives all season.

Grit Magazine published a clear how-to for a vertical pallet planter — line the back and sides with landscape fabric or heavy plastic to hold soil, fill through the slats, and plant each gap as its own row. The gaps act as natural divisions, so different herbs don’t fight for the same root space.

Safety note: Use only heat-treated pallets for anything edible. Look for the IPPC stamp with the letters HT (heat treated) and avoid any stamped MB (methyl bromide — a fumigant restricted under the Montreal Protocol). Unstamped pallets are unknowns; skip them for food crops. The same heat-treated pallets are fine for ornamental flowers either way.

8. Punched Tin Can Lanterns

Steel food cans — soup, tomato, coffee — are one of the most recyclable materials on Earth, but the recycling-then-buying-something-decorative loop has plenty of slack in it. With nothing more than a hammer, a few nails of varying sizes, and the freezer, an empty can becomes an outdoor lantern that throws constellation patterns across a patio at dusk.

HGTV’s tin can lantern tutorial covers the trick that makes this project work: fill the can with water and freeze it solid before punching, so the ice supports the can wall and prevents denting. Sketch your pattern on paper, tape it to the frozen can, punch through with a nail at each marked dot, and let the ice thaw. Drop in a battery tealight (much safer outdoors than a real flame) and group them along a walkway or down the center of an outdoor table.

The Point of All This

None of these projects requires you to buy more than a tube of waterproof adhesive, a bag of concrete, or maybe a stepping stone mold. The materials — chipped china, leftover wine bottles, empty cans, a forgotten pallet, an old rake — are already in your house or someone else’s. That’s the point. The greenest project is the one that uses what already exists, and the best part is that yours will look like nobody else’s.

Editor’s Note: This article, originally authored by Madeleine Somerville on June 17, 2015, was updated with corrected links and new ideas in May 2026.

The post Outdoor Projects You Can DIY for Almost Nothing appeared first on Earth911.

https://earth911.com/diy/outdoor-projects-you-can-diy-for-almost-nothing/

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Best of Sustainability In Your Ear: Author Nadina Galle on The Nature of Our Cities

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More than half the world’s population—4.4 billion people—live in cities today. That number is expected to rise to 80% by 2050. Our guest, Nadina Galle, is a trailblazing ecological engineer and author of The Nature of Our Cities. She is an ecological engineer who studies the intersection of nature and technology in urban environments. Nadina developed the concept of an Internet of Nature (IoN) that uses tools like artificial intelligence, automation, and sensors to support and enhance ecosystems within cities. Nadina’s book offers a transformative perspective on how urban spaces can be reimagined in the face of climate change and sprawling development. She shares the inspiring story of the Groene Loper project in Maastricht, Netherlands, where soil sensors were deployed to monitor tree health. The results were remarkable, with trees supported by this technology growing up to three times larger than those without it. This is a powerful example of how technology can not only protect trees but also transform urban spaces into healthier, greener environments.

Nadina Galle, an ecological engineer and author of The Nature of Our Cities, is our guest on .

From fire and the wheel to the reinforced concrete frames that define modern buildings, we are surrounded by technology. We tend to forget that technology emerged in response to nature — too often, we treated nature as the enemy, the chaos to be contained instead of recognizing that nature’s cycles and changes are the harmony we need to join to sustain society. The loss of any semblance of natural patterns, which ultimately leads to the depletion of the resources necessary for life, has inevitably led to the collapse of previous major civilizations. Modern society has more runway than previous societies because we have created a global economy, but that risks an even greater fall for our species when the ecological underpinnings of our prosperity collapse. The Nature of Our Cities, is a powerful, straightforward, and emotionally resonant book to help you think through your role and choices in the restoration of nature. You can find it on Amazon or Powell’s Books.

Editor’s Note: This episode originally aired in December 2024.

The post Best of Sustainability In Your Ear: Author Nadina Galle on The Nature of Our Cities appeared first on Earth911.

https://earth911.com/podcast/earth911-podcast-nadina-galle-on-the-nature-of-our-cities/

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