Over the last few years,
sustainability has become one of the biggest buzzwords in the fight against environmental problems like climate change, loss of biodiversity, ecosystem degradation, and pollution. But what does sustainability actually mean? And how do you make it part of your everyday life?
Broadly speaking, sustainability is the idea that we must meet our own needs
without compromising the ability of others to meet their needs, whether the “others” in question are future generations or people living in other parts of the world. But understanding the basic concept is one thing. Practicing it is quite another.
Every single day we make dozens of different choices that impact our planet. But understanding this impact is not easy. And when it comes to green living, there is a lot of conflicting information about what’s eco-friendly, what’s not, what’s fact, and what’s fiction.
But green sustainable living is possible. With a little guidance, we can all learn to make better choices for ourselves and the planet.
And that’s where the Sustainable Living Online Course from International Open Academy comes in.
Sustainable Living Online Course

When it comes to green living, there’s certainly no shortage of information available on the internet. The trouble is figuring out who knows what they are talking about and what information is legit.
If you’re tired of spending half of your research time trying to vet your sources and you just want straight answers to your questions about sustainable living, the Sustainable Living Online Course is for you. Sustainability experts designed this course to be the ultimate resource on sustainable living. As such, it covers everything you need to know to lead a renewable life that keeps you and the planet healthy.
Key topics covered in this online course include:
- how to make sustainable living easy
- how to look great without damaging the environment
- how to spot companies that aren’t eco-friendly
- how to save money and the planet at the same time
- how to find sustainable food that tastes great
- how to make simple swaps that make a big impact
Of course, the Sustainable Living Online Course won’t magically reduce your carbon footprint to zero. You’ll still have to put in the work and implement what you learn. But this course will give you the tools you need to be a better citizen and live a healthier, more natural life.
International Open Academy, or IOA, is one of the internet’s most trusted sources for online learning, with over a million students in 139 different countries. Whether you want to learn coding, interior design, or knitting, IOA’s accredited online courses make learning easy, fun, and affordable. No matter the subject, IOA courses focus on practical skills, with videos, texts, activities, and exams that students work through at their own pace.
Normally, the Sustainable Living Online Course costs $119. However, you can enroll through Groupon for just $17, which is a whopping 86 percent off the regular price.
If you’ve made it your goal to be more eco-friendly in 2023 but are unsure where to start, this deal on the Sustainable Living Online Course from International Open Academy is definitely for you. Click here to start your sustainable living journey today.
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Scientists tested 3 popular bottled water brands for nanoplastics. The results are alarming.
What does it mean for our health?
Evian, Fiji, Voss, SmartWater, Aquafina, Dasani… it’s impressive how many brands there are for something humans have been consuming for millennia. Despite years of studies showing that bottled water is no safer to drink than tap water, Americans are consuming more bottled water than ever, to the tune of billions of dollars in bottled water sales.
People cite convenience and taste in addition to perceived safety for reasons they prefer bottle to tap, but the fear factor surrounding tap water is still a driving force. It doesn’t help when emergencies like floods cause tap water contamination or when investigations reveal issues with lead pipes in some communities, but municipal water supplies are tested regularly, and in the vast majority of the U.S., you can safely grab a glass of water from a tap.
Now, a new study on nanoplastics found in three popular bottled water brands is throwing more data into the bottled vs. tap water choice.
What researchers actually found in those bottles
Researchers from Columbia University used new laser-guided technology to detect nanoplastics that had previously evaded detection due to their miniscule size.
The new technology can detect, count and analyze the chemical structure of nanoparticles, and they found seven different major types of plastic: polyamide, polypropylene, polyethylene, polymethyl methacrylate, polyvinyl chloride, polystyrene, and polyethylene terephthalate.
In contrast to a 2018 study that found around 300 plastic particles in an average liter of bottled water, the study published in the journal Proceedings of the National Academy of Sciences in January of 2024 found 240,000 nanoplastic particles per liter bottle on average between the three brands studied (the name of the brands were not indicated in the study).
As opposed to microplastics, nanoplastics are too small to be seen by microscope. Their size is exactly why experts are concerned about them, as they are small enough to invade human cells and potentially disrupt cellular processes.
“Micro and nanoplastics have been found in the human placenta at this point. They’ve been found in human lung tissues. They’ve been found in human feces; they’ve been found in human blood,” study co-author Phoebe Stapleton, associate professor of pharmacology and toxicology at Rutgers University’s Ernest Mario School of Pharmacy, told CNN Health.
What this means for your health
We know that nanoplastics are making their way into our bodies. According to UCLA Health, there is some evidence that they may be negatively affecting our health.
“Studies conducted on animals and on cells in a lab suggest nanoplastics can impact a variety of organs and systems throughout the body,” a report by UCLA Health states. “Exposure to high quantities of nanoplastics may affect cell’s immune function and cause inflammation…There is even some evidence that by altering cell function, nanoplastics may increase the risk of some types of cancer.”
The UCLA Health report notes, however, that “very little research to date has looked specifically at humans.”
According to Dr. Sara Benedé of the Spanish National Research Council’s Institute of Food Science Research, it’s not just the plastics themselves that might cause damage, but what they may bring along with them.
“[Microparticles and nanoparticles] have the ability to bind all kinds of compounds when they come into contact with fluids, thus acting as carriers of all kinds of substances including environmental pollutants, toxins, antibiotics, or microorganisms,” Benedé told Medical News Today.
Where is this plastic in water coming from?
This study focused on bottled water, which is almost always packaged in plastic. The filters used to filter the water before bottling are also frequently made from plastic.
Is it possible that some of these nanoplastics were already present in the water from their original sources? Again, research is always evolving on this front, but microplastics have been detected in lakes, streams and other freshwater sources, so it’s not a big stretch to imagine that nanoplastics may be making their way into freshwater ecosystems as well.
However, microplastics are found at much higher levels in bottled water than tap water, so it’s also not a stretch to assume that most of the nanoplastics are likely coming from the bottling process and packaging rather than from freshwater sources.
A subsequent study from The Ohio State University also found that bottled water contains three times as many microplastics as tap water. Researchers there recommended drinking filtered tap water from a reusable metal bottle as the best way to reduce daily exposure.
As for exactly where all those nanoplastics are coming from, the research is still evolving.
“Based on other studies we expected most of the microplastics in bottled water would come from leakage of the plastic bottle itself, which is typically made of PET (polyethylene terephthalate) plastic,” lead author Naixin Qian, a doctoral student in chemistry at Columbia University, told CNN Health. “However, we found there’s actually many diverse types of plastics in a bottle of water, and that different plastic types have different size distributions. The PET particles were larger, while others were down to 200 nanometers, which is much, much smaller.”
At this point, we have plenty of environmental reasons for avoiding bottled water unless absolutely necessary and opting for tap water instead. Even if there’s still more research to be done, the presence of hundreds of thousands of nanoplastics in bottled water might just be another reason to make the switch.
This article originally appeared two years ago. It has been updated.
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Feeling lazy, unmotivated, and ashamed of it? Doctor says it could be undiagnosed ADHD.
“75% of adults with anxiety actually have ADHD as the cause of their anxiety.”
If it seems that everyone is being diagnosed with Attention Deficit Hyperactivity Disorder (ADHD), there may be a reason and it’s likely not the reason people think. Diagnostic criteria were initially based on how ADHD presented in white children who were mostly male, so if you fell outside of that box your diagnosis was often overlooked. This is especially true in girls who then turned into undiagnosed or misdiagnosed women.
But it’s not just women who were undiagnosed since the criteria mostly included ways in which hyperactivity showed up, you know, the “H” in ADHD. But not everyone with ADHD presents with the stereotypical hyperactivity bit.
A lot of adults slipped through the cracks
That means a lot of kids fell through the cracks and, as kids do, eventually became adults.
Family physician and ADHD expert Dr. Heather Brannon breaks down ways in which ADHD is missed and how to identify it in adults in a TEDx Talk in 2021.
In the first few minutes of the video, Brannon shares a clinical observation that feels mind-boggling
“75% of adults with anxiety actually have ADHD as the cause of their anxiety.” Even though I fit into that category, consider my mind completely boggled because I thought I was a rarity and my psychiatrist was a magician. Turns out, he was probably just up to date on his continuing education credits.
Brannon talks about how people who may express feelings of overwhelm, anxiousness, and tiredness and who are easily frustrated may actually have undiagnosed ADHD.
It’s pretty easy to overlook ADHD that presents with more of the attention deficit part of the diagnosis than the hyperactivity part. When someone is having difficulty sitting still, talking so fast that you can barely keep up, and is constantly on the go, it’s pretty easy to pinpoint there may be an issue.
But when the person is quiet, sits still but misses large chunks of conversations, or is chronically forgetful and sleepy, it’s much easier to miss the signs, according to Brannon.
Brannon says many people feel bad about themselves without knowing why, so having an answer for why you’re feeling this way can be helpful.
Does any of this sound like you?
In the clip, Brannon introduces us to a theoretical person named Sally.
Sally is successful, creative, and holds a master’s degree. She’s functioning at a high level by all indications, but Sally struggles with procrastination, getting sidetracked, and feeling unmotivated. She feels lazy and ashamed of it, but she just can’t bring herself to change her behavior.
Brannon says that Sally is typical of adults with undiagnosed ADHD. These are people who feel and know something is not quite right with them, but they have no idea what.
As for a little happy ending, Sally eventually finds out that she has ADHD and receives treatment. Brannon says in the video that the right medication can make a world of difference.
“Now [Sally] can have creative thoughts without having that big swirl of ideas running around in her head. She can look at an email to see if she has time to answer or she needs to save it for later. Now Sally can be on time for her appointment, and that frees up the perfectionist that was trying so hard to be on time before and was failing every time.”
The numbers are bigger than you’d expect
Brannon says that over the span of her career, she would estimate about 2 or 3 out of 10 adults have undiagnosed ADHD and are living a life of difficulty and shame.
“That’s a lot of people who could be feeling a whole lot better,” she says.
This article originally appeared three years ago. It has been updated.
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Astounding 2013 study found that ‘expressive writing’ can help heal physical wounds
Remarkable things happen when you relieve your psychological stress.
It’s not breaking news that journaling has been proven, again and again, to be good for you—mind, body, and soul.
But not all journaling is created equal. Writing about what you did that day and your future plans has a profoundly different effect than writing about your deepest emotions, especially the upsetting ones. A growing body of research now shows that confronting your deepest traumas and experiences in order to put them on the page not only makes you feel better, but can even help heal you. One remarkable scientific study demonstrates how.
Landmark study indicates that “expressive writing” has healing powers
The body of research around expressive writing had been growing for years. American social psychologist James Pennebaker is considered one of the leading voices in pioneering this area of research.
In an interview with the American Psychological Association, Pennebaker recalled wondering, “If secrets are so bad, what if we brought people in the laboratory and had them talk about them… [but] that turned out to be way too complex. How about we just had them write about it? And that was kind of the birth of expressive writing.”
Pennebaker’s remarkable research revealed that expressive writing could improve mental health, boost the immune system, and reduce doctor visits. In 2013, a group of researchers wanted to see whether these benefits could carry over even further into the physical world.
In the study, two groups of adults ages 64 and older underwent a simple biopsy procedure. It left a small wound on the upper arm that was uniform in size across all participants and could easily be monitored for changes in healing.

A Band-Aid covers a wound. Photo credit: Canva One group was assigned to perform expressive writing for 20 minutes per day, writing about its deepest thoughts and most upsetting life experiences.
The other group, rather than not writing at all, journaled daily about its activities but did so in an emotionally neutral register.
Just 11 days after the biopsy, 76% of the expressive writing group had fully healed. That’s almost double the rate of the control group, of whom only 42% had healed.
A thorough review found almost no other differences in the adults’ cognitive or physical health, which makes a powerful case that the expressive writing exercises were responsible for the improved healing.
Why emotional writing can have a physical impact
Pennebaker, for his part, recognized that deeply emotional journaling is not just about the physical act of writing.
In order to write about upsetting experiences in your life, you have to turn them over and over in your mind and confront them head-on.
“Getting people to actually sit down and confront it and to write it, you don’t have to write a lot, but you have to first of all just acknowledge it and put it into words,” Pennebaker said. “And that was really for me, the breakthrough.”
Emotional writing eases psychological stress. Feelings like anxiety and stress can have severe negative health consequences, so it stands to reason that relieving some of that stress should have a positive payoff. Less stress on the immune system, for example, means it’s better able to do its job of warding off sickness and healing wounds.
According to Harvard Health Publishing, “The process of writing may enable [people] to learn to better regulate their emotions. It’s also possible that writing about something fosters an intellectual process — the act of constructing a story about a traumatic event — that helps someone break free of the endless mental cycling more typical of brooding or rumination.”
The power of “letting it out”
A majority of scientific research agrees that learning to understand and express what’s happening inside us is a key component of mental health.
“Labeling and expressing what’s going on inside can calm our nervous system. It also gets us in touch with our internal senses and what’s going on beneath the skin, in the heart, and in the brain,” said Alli Spotts-De Lazzer, a licensed therapist. “The connection of thoughts flowing through and out may be similar to ‘name it to tame it,’ a concept related to calming emotional distress and increasing emotional regulation.”
It can be dance, it can be art, or it can be talking it out with a therapist or friend. The important thing is that expression, or disclosure, is necessary. The unique power of expressive writing, however, is that it forces us to address our biggest sources of pain and anxiety head-on.
Expressive writing has its limitations, of course.
It’s not necessarily a cure-all for people suffering from serious mental health conditions like chronic anxiety or major depression. And it can’t cure cancer or miraculously heal a broken leg.
Some research also shows that expressive writing can temporarily make people feel worse before the mental health benefits kick in. And for people who have recently undergone trauma, it may simply be too soon to write about it. Pennebaker himself advises therapists not to assign expressive writing to patients until at least a few months after an incident.
However, the study is fairly undeniable evidence of the mind-body connection. Science shows us that placebos can work wonders, even when people know they’re taking a placebo. And expressive writing research is beginning to show just how incredible the physical benefits of relieving psychological stress can be.
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Why does a facial itch feel a lot different than one on your arm? Science just figured it out.
If you suspected something was different, you weren’t wrong.
An itch on the tip of your nose can feel different from one on your rear end—and possibly a bit more painful. Why is that? Shouldn’t your body treat an itch like an itch, no matter where it pops up?
According to a new study from North Carolina State University, your body treats itches on your face much differently than it treats them on the rest of your body.
The study found that your body sends itch signals from the face and the rest of the body along different routes to your brain, where they are processed. It’s as if your body has two different “itch phone lines” communicating with the brain—one from the face and another from the rest of the body.
Itches travel to your brain differently throughout the body
An itch on your arm starts with irritation of the skin—perhaps from dryness—then travels through the dorsal root ganglia, the spinal cord, and finally to the brain. An itch on your face goes from the spot of irritation to a different system called the trigeminal ganglia, and then to the brain.

An itchy forearm. Photo credit: Canva Here’s the straight science:
“You can think of itch being transmitted from the skin to the brain as a series of switches that get flipped,” Santosh Mishra, associate professor of molecular biomedical sciences at NC State, said in a statement.
“On the body, itch signals go from neuronal projections in the skin through the dorsal root ganglia (DRG) – which are clusters of sensory cells located at the root of the spinal nerves – then to the spinal cord. But on the face and head, those signals travel to the trigeminal ganglia (TG) – which are clusters of sensory cells located in a small structure below the brain where it sits atop the skull,” Mishra added.

A woman scratching her arm. Photo credit: Canva Your body sends mixed signals to your face
The researchers also discovered why an itch on your face may feel different from one on your torso. Studies showed that when histamine, an itch-inducing substance, was applied to the neck and cheek, the cheek itched less than the neck. Researchers initially assumed this was because there are fewer nerves in the cheek, but they were wrong: the cheek actually has far more. Instead, the face sends itch and pain signals simultaneously, and pain often overrides the sensation of itching. In the rest of the body, those signals are separated. That’s why an itch on your face feels different and may even be more painful than one on your arm.

A woman scratching her neck. Photo credit: Canva Now that we know why an itch on your cheek feels different from one on your stomach, researchers can work on therapies that better address skin irritation on different parts of the body. One day, you may have a separate cream for a facial itch and another for one on your torso—not because of marketing, but because of real science.
“Understanding how itch perception in the face differs from itch perception in the body could give us better molecular targets for future therapies,” Mishra said.
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Man builds the ‘world’s smallest tiny house’ and somehow makes it work in 19 square feet
“The absolute coziest house ever conceived.”
Levi Kelly wanted to go small. Very small. As someone who loves building and touring tiny homes, along with unique Airbnbs and cabins, he wanted to create something truly special. Though the idea of a tiny home isn’t new and certainly began picking up steam in the early 2000s, Kelly wanted to raise— or, in this case, lower—the bar and make a statement about just how efficient he could get.
In an Instagram clip originally posted just over a year ago, but now making the rounds on social media again, Kelly shows viewers this extraordinary tiny home. Reminiscent of a tree house, its dark brown exterior and cheery windows look genuinely inviting. The most shocking part? It’s only 19.46 square feet.
19.46 square feet
The quick tour begins with an exterior view of the home, which is hitched to a two-wheeled trailer. Kelly explains, “I built the world’s smallest tiny house by square footage. It’s 19.46 square feet. Totally off-grid. You can see the solar panels up there. And it’s on a trailer. Take it anywhere you want to go.”
He then pulls open the door and says, “Walking inside, let’s see how I fit everything in here.” The door opens to an extremely narrow hallway. On one side is a small sitting area with wooden drawers underneath. Straight ahead is a sink beneath a rather large window, at least relative to the size of the space.
Kelly’s tour continues: “There is a seating area here to the left. Underneath, we have your AC and heating units, and it comes out of this little vent right there. And then on the other side is a battery bank for the solar panel. And that’s how everything in here gets plugged in.”
Running water, too
Blink and you’re in the kitchen, where a tiny fridge sits atop the counter. “Up here is your kitchen. We have a mini fridge up here for some drinks.” He removes a light brown cover from a square opening, almost like a jigsaw puzzle piece, revealing that the countertop also doubles as a sink. “Here’s your sink. Open this up and it unfolds.” He turns on the water. “Check that out. Running water. So we’ll shut that back up for more countertop space.”
He opens a cabinet beneath this area. “Underneath, we have our water tanks, and you can have a little electric grill to take out and put there if you need to.” He then points to another tiny space on the counter.
Can’t be taller than 5’10”
Some, at this point, might wonder where someone would sleep in this house. “You’re wondering about the bed situation. Well, it’s up here.” He then points upward, where a platform is hooked to the ceiling. That is indeed the bed. He explains, “It folds down and can fit somebody that’s 5’10” or shorter.”
As for the bathroom? Kelly has that covered. Once again, he takes the camera outside and shows a small shower head attached to the corner of the house. “You’re probably wondering about the bathroom situation. The outdoor shower is right here. Set this up and turn on the water and you’ve got yourself a little shower.”
And what about the toilet? Off to the side, there’s an even smaller “storage area.” He explains, “You can take the lid off. The storage is stored in there, which is now right behind me.” The camera then cuts to a fresh white toilet sitting on the lawn. “You can go use the bathroom in nature anywhere you want. And it does flush.”
Only a month and $5,000
In a more detailed tour of the tiny home posted on YouTube, Kelly shares additional details:
“This took over a month and $5,000. It’s a truly functioning tiny house. It has power, running water, kitchen, separate seating, separate bed, shower, flushing toilet, AC, and heating—everything a modern house has, just in the size of 19.46 square feet (1.8 square meters). The nicest tiny house of this relative size I have ever seen.”
He also shares more details about the materials used, including the padauk wood on the window sills and the walnut kitchen countertops. He even demonstrates what it’s like to have three people sitting in the bench area at the same time. “Here’s a clip of me, Weston (his son), and my wife.”
We also get a full look at how the “bed” works, which Kelly admits was his one slight miscalculation. There isn’t much space to climb up to the bed, but he demonstrates how to do it by stepping onto the countertop and hoisting himself into the small cubby.
One YouTube commenter joked that if the bed doesn’t work, “you can sleep on the roof like Snoopy.”
Another commenter was a big fan, even imagining what it could look like during the holidays: “Imagine adding tiny picture frames or minuscule paintings to the walls, and Christmas decorations outside in winter. The absolute coziest house ever conceived.”
A few commenters were concerned about the complete lack of storage, joking that someone might have to keep their belongings in their car. But if you like the idea of the tiny house and don’t necessarily want to break any records, Kelly has other tiny homes with a bit more room. One can even be packed up and “unfolded in a single day.”


















