NewsMakers
Air conditioner bumps the electric bill by 42%, increasing the risk of energy poverty
The actual increases will depend on the intensity of the change in climate households will have to face in the future. Those additional spendings are thus a new factor influencing the energy poverty of the poorest households, a situation arising when the families spend more than 5% of their annual income on electricity.
A new study published in Economic Modelling by researchers at Ca’ Foscari University and CMCC shows that owning and using an Air Conditioner greatly increases the electricity bills of households, with important implications for the energy poverty of the less well-off.
Previous studies, mainly focused on the US, estimated an increase of household spendings for electricity bills of about 11%. This new study, analysing the socio economic characteristics of households in eight other OECD countries (Australia, Canada, France, Japan, the Netherlands, Spain, Sweden, and Switzerland) and climate data coming from a NASA dataset, finds that on average, using an AC brings 42% more spending for electricity bills, with respect to the ones who do not have an AC unit in their home.
The actual increases will depend on the intensity of the change in climate households will have to face in the future. Those additional spendings are thus a new factor influencing the energy poverty of the poorest households, a situation arising when the families spend more than 5% of their annual income on electricity.
According to BPIE, in 2014 the population already affected by fuel poverty in Europe ranged from 10% to 15%, depending on the member state. This new study shows a more worrying situation.
“The concept of energy poverty is usually related to ensuring adequate heating during the coldest months – explains Enrica De Cian, professor of Environmental Economics at Ca’ Foscari and leader of the Energya team which drafted the study. – Our data, however, indicate that we should widen the concept to include the increasing role of cooling during the summer months. Poorest households already spend a consistent share of their budget for basic goods such as food and electricity. The latest will have to increase to ensure adequate protection of our health especially among the most vulnerable members of households during heatwaves.”
Owning an AC has already important implications for the energy expenditures of households, up to the scale of countries and beyond, with great variations across countries: it represents about 11% of the total final energy use in buildings in the US, while only 1.2% in Europe.
“Our analysis reveals that in Spain 18.5% of households already spend more than 5% of their annual budget in electricity – confirms the Venitian professor. Those percentages are generally higher in coldest countries, reaching for instance 24.2% in Sweden. In France and Switzerland, we find lower numbers, respectively 8% and 5%.
Who uses ACs and why
“The innovative element of this work – adds Teresa Randazzo, first author of the study – is that we take into account drivers of AC adoption and use in households that are difficult to observe and measure, such as the personal perception of thermal comfort, the risk aversion, or the environmental awareness.”
The study disentangles the various characteristics of individuals and households to point out to the ones leading – or not – to a wider AC adoption. For instance, a larger share of younger members brings a wider adoption of AC, while more educated individuals tend to use those appliances less, suggesting they are more aware of the impact of energy on the environment.
Similarly, households that are more accustomed to adopting energy-saving behaviors are less likely to adopt AC. On the opposite, those with a high number of appliances tend to have a higher propensity for AC – which may be an indication that those used to higher standards of comfort are also more inclined to adopt AC.
“Living in an urban area increases the probability of having AC by 9 percentage points, a sizable effect compared to the role of income and climate, probably due to the heat island effect in cities” adds Malcolm Mistry, responsible for the climate data analyses for the Energya project and co-author of this study.
Data analysis of households and climate
To understand the dynamics of AC adoption in industrialized countries and its impact on the budget of households in the light of climate change, the Energya team examined eight OECD countries spanning across mid-latitudes: Australia, Canada, France, Japan, the Netherlands, Spain, Sweden, and Switzerland.
To do so, the researchers combined the information of 3,615 geocoded households from a dataset released by the OECD with a historical climate dataset based on NASA-GLDAS data. “Our elaboration of this climate dataset includes Cooling Degree-Days (CDDs) for the last 49 years, an indicator commonly used in the literature to capture the typical intensity and duration of warm days, and the corresponding cooling requirements” explains Malcolm Mistry.
AC global trends
From 1990 to 2016 global annual sales of air conditioners more than tripled to reach 135 million units worldwide, with figures from the residential sector alone underscoring the trend. China leads, with 41 million residential units registered, followed by 16 million in the US, and roughly 9 million in both Japan and Europe. Penetration of air conditioning in households is expected to continue to increase sharply, because of climate change and thanks to increasing standards of living, reaching 21% in Spain and 35% in France in 20 years from now” concludes prof. De Cian.
Beauty & Fashion
Redefining aesthetics: From anti-aging to healthy aging
Growing attention is now being given to healthy aging, understanding how the entire face changes over time, preserving facial harmony, and helping people continue to look like themselves.
For decades, “anti-aging” has defined the beauty and aesthetics conversation, promising to erase wrinkles and reverse the signs of time. Today, that conversation is shifting.
Aging is no longer just about looking younger. Growing attention is now being given to healthy aging, understanding how the entire face changes over time, preserving facial harmony, and helping people continue to look like themselves.
A review published in Facial Plastic Surgery, The Anatomy of the Aging Face: A Review, describes aging as changes across bone, ligaments, muscles, fat, and skin. Another review in Aesthetic Surgery Journal, The Facial Aging Process From the “Inside Out”, explains how changes beneath the surface eventually become visible on top.
Studies in Plastic and Reconstructive Surgery show facial fat is organized into distinct anatomical compartments that can lose volume and shift position over time, altering facial shape and balance.
For multi-awarded aesthetic physician Dr. James Co, founder of Cosma Institute and Architect of Aesthetic Confidence, these findings are the reason aesthetic care must start with understanding, not just treating.
“Aging is not a disease we need to cure,” Co said. “It is a biological process. As physicians, our role is to understand what is changing beneath the surface, how those changes differ from person to person, and whether intervention is appropriate in the first place.”
“When you only look at the wrinkle, you are looking at the surface of a much bigger anatomical process,” he added. “The face ages as a system. Good assessment means understanding what is happening underneath before deciding what should be done on the surface.”
Part of that understanding is recognizing that no two faces age the same way. Two people can be the same age and experience aging very differently. Genetics, skeletal structure, fat distribution, skin characteristics, sun exposure, lifestyle, and environmental factors all influence how aging presents.
“Two patients can be the same age and come to me with completely different anatomy, lifestyles, concerns, and goals,” Co said. “Why would we expect their treatment plans to look exactly the same?”
This is where healthy aging broadens the conversation — from fixing isolated signs to looking at the face as a whole and listening to what the individual actually wants.
“Someone can want to look refreshed without wanting to look 20 years younger,” Co said. “Those are completely different goals.”
Rather than trying to freeze one version of the face forever, healthy aging acknowledges that the face will continue to change. As different structures change at different rates, the relationship between features evolves. Facial harmony is therefore not fixed.
“You cannot freeze one version of your face forever,” Co said. “But you can understand how the face is changing and make decisions that respect its natural proportions and your identity.”
In the age of social media, where aesthetic treatments are highly visible, Co cautions against self-diagnosis.
“Patients should not have to diagnose themselves from social media,” he said. “You might recognize a concern, but deciding why it is happening and what should be done about it requires proper assessment.”
The shift is also about how people feel, not just how they look. A 2022 review on minimally invasive facial aesthetic procedures found studies are increasingly looking beyond physical changes to include satisfaction with appearance and aspects of psychological and social well-being, while noting that evidence still needs careful interpretation.
For Co, this reinforces that success is not always about looking dramatically younger.
“We need to ask whether the result makes sense for the patient, whether expectations were met, and whether we preserved the things that make that person recognizable,” he said. “I would rather someone tell my patient, ‘You look well,’ than immediately ask, ‘What did you have done?'”
At Cosma Institute, Co applies this consultation-led philosophy through individualized assessment, facial harmony, medical judgment, and patient education. Having trained aesthetic practitioners across Southeast Asia and Europe, he advocates for natural-looking outcomes that respect the characteristics already present in each face — an approach that recently earned him two awards at the Merz Aesthetics Tala Awards.
For Co, the evolution of aesthetic medicine is not about having more tools, but knowing when to use them — and when not to.
“Aging cannot be stopped, and I don’t think that should be the promise,” he said. “What we can do is understand it better. We can look at the science, understand the anatomy, listen to the patient, and make decisions that allow them to age while still looking recognizably like themselves.”
For Co, healthy aging begins not with fighting age, but with understanding it.
NewsMakers
The look and feel of your neighborhood may affect your sleep
Those living in neighborhoods rated as having a stronger sense of safety tended to sleep longer, and that this rating appeared to be shaped by the streetscape.
Your neighborhood’s “streetscape”—the physical environment of your street—is something that you have probably never consciously thought about, despite seeing it every day. But what if the streetscape was affecting you on a subconscious level and disrupting your sleep?
This intriguing question is posed by the findings of a study led by Professor Daisuke Matsushita of the Graduate School of Human Life and Ecology at Osaka Metropolitan University. The research team used AI to analyze more than 200,000 Google Street View images to identify visual neighborhood characteristics. They then linked these characteristics to the self-reported sleep of 1,089 working adults living on the lower floors of apartments in Tokyo, who were most likely to be affected by the streetscape.
They found that those living in neighborhoods rated as having a stronger sense of safety tended to sleep longer, and that this rating appeared to be shaped by the streetscape. Generally, people slept longer in areas with lots of greenery, such as leafy trees, on the street. Similarly, high “enclosure”—meaning many tall vertical buildings and few wide-open spaces—was also associated with longer sleep and fewer insomnia symptoms.
However, the study also made a surprising finding. The researchers found that highly walkable streetscapes, such as those with more sidewalks and traffic signs, were associated with a lowered sense of safety and shortened sleep duration.
This suggests that walkability does not always represent a reassuring environment. Instead, a possible explanation is that streets with extensive pedestrian infrastructure are often busier, more crowded, and used by more strangers, which may be perceived as less safe or less relaxing than quieter residential streets.
“This study demonstrates the potential for evaluating streetscape characteristics across large geographic areas in a cost-effective manner,” Dr. Matsushita said. “Based on the technique used in this study, cities could potentially measure perceived safety, beauty, liveliness, and enclosure as well as pollution and noise.”
“We hope that opening up this new perspective creates further possibilities for designing healthier neighborhoods,” he concludes.
The findings were published in Building and Environment.
NewsMakers
Workout or nap? Either can help your sleepless brain, study finds
People who either completed 20 minutes of moderate-to-vigorous exercise or took a 90-minute nap performed about 22 per cent better on memory tests after 30 hours without sleep than those who did neither.
A short workout or a nap can help protect memory after a sleepless night, a McGill University-led study has found.
Researchers found people who either completed 20 minutes of moderate-to-vigorous exercise or took a 90-minute nap performed about 22 per cent better on memory tests after 30 hours without sleep than those who did neither. The findings, published in Proceedings of the National Academy of Sciences (PNAS), point to practical ways to counter the effects of sleep deprivation.
“Sleep loss affects nearly every aspect of how we think and function, but many people can’t simply stop what they’re doing and get more sleep,” said senior author Marc Roig, Professor in McGill’s School of Physical and Occupational Therapy. “Our findings show that even a brief bout of exercise may help preserve one of our most important cognitive abilities.”
The study involved 54 healthy young adults who stayed awake for 30 consecutive hours under lab supervision. Participants were then assigned to one of three groups: a 20-minute cycling session, a 90-minute nap or a control condition. Three days later, researchers tested their memory for images they had viewed immediately after the intervention. Those who exercised or napped remembered significantly more images than participants who did neither.
Same result, different pathways
While the memory benefits were nearly identical, brain recordings revealed that exercise and napping helped in different ways.
Napping appeared to help the brain recharge, making it easier to take in and remember new information. Exercise, by contrast, helped the brain use its remaining resources more efficiently, without making participants feel more tired.
The findings could eventually inform fatigue-management strategies in workplaces where sleep loss is common and mistakes can have serious consequences, such as health care, transportation and emergency response.
“A nap isn’t always possible in the middle of a shift,” said first author Madhura Lotlikar, a doctoral candidate in McGill’s Department of Neurology and Neurosurgery. “Exercise is accessible, inexpensive and easy to implement. That makes it a promising tool to help people stay cognitively sharp when sleep is limited.”
The researchers emphasize that exercise cannot replace sleep, but it may help people function better when getting enough rest isn’t possible.
About the study
“Protecting episodic memory after sleep loss: Similar benefits of exercise and naps via distinct neural contributions” by Madhura Lotlikar and Marc Roig et al., was published in Proceedings of the National Academy of Sciences of the United States of America.
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