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Heart disease deaths spike with extreme heat, and rising temperatures due to climate change may lead to a surge in such deaths in hot regions, researchers say.

For the study, the investigators analyzed 2010 to 2016 data on more than 15,000 heart-related deaths among people aged 15 and older in Kuwait, which has an average temperature of 82.2 degrees Fahrenheit (F).

Compared ...

Smog drives up dementia risk, particularly for older men and women with heart disease, according to a new Swedish study.

For more than a decade, researchers tracked exposure to air pollution and dementia cases among nearly 3,000 Stockholm residents aged 60 and up.

Lead author Dr. Giulia Grande noted that exposure to dirty air has long been linked to an increased risk for lun...

Electric cars really are greener than gasoline ones, researchers report.

Some have questioned whether electric cars could actually increase carbon emissions when the generation of the electricity to run them is taken into account.

But a new study concluded that in most areas of the world, electric cars reduce carbon emissions overall, even if the generation of electricity to...

As the days heat up, people tend to report more emotional distress, a new study finds, adding to concerns that global warming could take a growing mental health toll.

The study of more than 3 million Americans found that the longer people had to sweat out 80-degree days, the bigger the mental health drain. They were more likely to report problems with depression, stress and emotional ...

As the Earth continues to warm from climate change, an estimated 1.2 billion people will be affected by heat stress from extreme heat and humidity by 2100, a new study predicts.

That is four times more people than are affected today and over 12 times more than would have been affected if climate change hadn't happened, researchers say.

"When we look at the risks of a warme...

Using past weather data to predict climate change-linked increases in extreme weather events may underestimate how often they'll occur, with potentially serious consequences, a Stanford University study says.

It found that predictions based solely on historical records underestimated by about half the actual number of extremely hot days in Europe and East Asia, as well as the number o...

The novel coronavirus appears to be seasonal in nature, with major outbreaks occurring mainly in regions that match a specific set of climate conditions, a new study argues.

All areas experiencing significant outbreaks of COVID-19 fall within a northern corridor that has an average temperature of 41 to 52 degrees Fahrenheit and an average humidity of 47% to 79%, according to v...

Teens who live around lots of obese or overweight kids come to see their body types as ideal, a new study suggests.

As a result, these teens tend to be obese or overweight themselves, researchers say.

"Higher obesity rates may normalize unhealthy weight in teens and make obesity prevention harder," said lead researcher Ashlesha Datar. She's a senior economist at the Center...

Sea turtles mistake the smell of stinky plastic for food, researchers say.

Sea turtles worldwide are threatened by marine plastic debris, mostly due to eating it and getting tangled in it, noted the authors of the study published March 9 in the journal Current Biology.

"We found that loggerhead sea turtles respond to odors from biofouled plastics in the same way they ...

Access to nature is growing harder for urban folks to find, with relatively wild places few and far between.

Now, researchers with the University of Washington (UW), in Seattle, have found that not all forms of nature equally benefit human well-being. Wildness is especially important for both physical and mental health, the new study finds.

"It was clear from our results tha...

While many Americans are ready to celebrate the end of winter, those with seasonal allergies are already dreading the sneezing, wheezing, itchy eyes and runny nose that spring brings.

"Spring allergies can be tricky to treat because not everyone is allergic to the same things, even though symptoms may look a lot alike," said Dr. J. Allen Meadows, president of the American College of A...

Just a bit of time spent with nature each day can reduce college students' stress, researchers say.

They reviewed studies on the effects of being in nature on 15- to 30-year-olds to see how much time college students should be spending outdoors and the best ways to reap the benefits.

Ten to 50 minutes of sitting or walking in natural spaces did the most efficient job of impr...

Worldwide, air pollution may be shortening people's life expectancy by an average of three years, according to new estimates.

Researchers calculate that air pollution actually has a bigger impact on life expectancy than tobacco smoking, HIV/AIDS or violence.

While that might sound surprising, it reflects the ubiquity of air pollution, said study co-author Jos Lelieveld of th...

If you child has allergies or asthma, you need to take that into consideration when selecting a summer camp.

"Parents and kids alike who are dealing with asthma or severe allergies need to know there's a good fit and that the child's medical needs are being met," said Dr. J. Allen Meadows, president of the American College of Allergy, Asthma and Immunology.

"Take the time to...

The crisis aboard the quarantined Diamond Princess cruise ship in Japan shows how germs can spread rapidly through air conditioning systems that can't filter out particles as small as the new coronavirus, one air quality expert says.

The quarantine ended last Wednesday, but not before the number of coronavirus cases reached 690 and three deaths were reported, according to the Asso...

A new poll suggests that education is all that stops most Americans from embracing plant-based diets that are better for the planet.

The poll, of just over 1,000 adults nationwide, found that 51% said they would eat more plant-based foods if they knew more about the environmental impacts of their eating habits, but 70% said they rarely or never discuss this issue with friends ...

Sledding, skiing and ice skating are big fun in the winter, but can lead to big injuries, too.

The American Academy of Pediatrics (AAP) reminds parents to take steps to help their kids avoid injury and make sure they're dressed appropriately for the cold weather.

"This is the time of year when we see people return from winter break vacations with knee injuries from skiing, ...

Deadly air pollution doesn't stop at state borders, researchers warn.

Their analysis of 2005-2018 data on different types of air pollution from a variety of sources showed that half of pollutants generated in one state are carried by winds to affect the health and life span of people in other states.

More than half of early deaths related to air pollution in the United State...

Much more food is wasted worldwide than commonly thought, a new study shows.

In 2005, the Food and Agriculture Organization of the United Nations (FAO) estimated that one-third of all food available for human consumption was wasted.

This figure has been used to show the extent of food waste worldwide, but it considers supply alone and not consumer behavior.

The new...

There is little more magical than the glow of fireflies on a still summer night, but new research suggests that light pollution threatens firefly populations worldwide.

The other major dangers putting some of the more than 2,000 different species of fireflies at risk of extinction include habitat loss and pesticides, according to firefly experts.

There's been a huge increase...

Americans who grew up in the swath of the South known as the Stroke Belt are more likely to develop thinking declines later in life, even if they moved away as adults, a new study suggests.

But people who grew up elsewhere and moved to the Stroke Belt are less likely to succumb to so-called cognitive decline than if they'd lived there all their lives, researchers found.

"A...

Daily exposure to ground level ozone increases city residents' risk of early death, researchers warn.

Ground level ozone -- commonly found in cities and suburbs -- forms when pollutants react in sunlight.

New study findings suggest that thousands of ozone-related deaths "could be potentially reduced under stricter air quality standards," according to study co-author Ana Vice...

Zoos that have large, well-known types of animals attract more visitors, which means more money for conservation, a new study finds.

Zoos and aquariums are among the leading sources of conservation funding and refuges for species with dwindling numbers in the wild.

"Our findings show that charismatic animals in the care of accredited zoos, and the visitors that come to see t...

Before you throw any leftovers away, heed new research that suggests the choice could hit you right in your pocketbook.

It turns out that almost one-third of food in American households goes to waste, costing each household thousands of dollars a year, researchers report.

"Our findings are consistent with previous studies, which have shown that 30% to 40% of the tot...

The cataclysmic eruption of Mount Vesuvius in 79 A.D. created temperatures so hot that one poor soul's brain was transformed into glass, researchers report.

Archaeologists working at the site of Herculaneum -- the other city wiped out in the eruption, alongside Pompeii -- discovered small bits of black glass inside the skull of one of the victims.

Tests of the glassy materia...

While health problems from childhood exposure to lead and mercury are on the decline, these and other toxic chemicals continue to take a toll, a new study reports.

The progress likely owes to decades of restrictions on use of heavy metals. But researchers from NYU Grossman School of Medicine in New York City said that exposure to other toxic chemicals -- especially flame retardants ...

Wildfires like the ones that have ravaged Australia in recent months are likely to become more common as climate change continues to wreak havoc on the planet, a new study suggests.

The Australian wildfires prompted British researchers to review 57 studies published since 2013.

All of the studies show an association between human-driven climate change and increased frequency...

If you can't quite bring yourself to declutter your home and toss out unneeded possessions, one reason why might surprise you.

Researchers say the emotional tug you feel might be loneliness.

"When consumers make decisions about how to get rid of multiple possessions, perhaps when they are moving, it is a time when they are likely to feel lonely," said Catherine Cole. She's a...

Nearly two decades after terrorists attacked New York's World Trade Center, certain cancers are striking police and recovery workers who saved lives, recovered bodies and cleaned up the wreckage.

This particular group of responders appears to have an increased risk of developing thyroid cancer, leukemia and prostate cancer, as well as a slightly elevated overall risk of cancer, resear...

If climate change continues unabated, the United States should prepare for an increase in deaths from injuries, a new study claims.

Looking at data on injury deaths and temperature over 38 years, researchers found a correlation between unusually high temperatures and increased rates of death from a range of causes -- traffic accidents, drownings, assault and suicide.

The res...

Wildfires are becoming increasingly common, and along with the rising environmental damage, a new study finds more breathing problems for kids.

In December 2017, a small wildfire in San Diego County, Calif., resulted in 16 more kids a day than usual showing up in emergency departments with trouble breathing, respiratory distress, wheezing or asthma.

Before it was over, the...

Decades-banned pesticides apparently continue to interfere with fetal growth during U.S. pregnancies, a new study reports.

DDT was banned in 1972 in the United States, but low levels of it and other organic chemical pollutants can still be found in the blood of pregnant American women, researchers reported online Dec. 30 in JAMA Pediatrics.

Women carrying even low levels ...

People with high levels of a common insecticide in their system are far more vulnerable to heart disease, a new study suggests.

According to Wei Bao, assistant professor of epidemiology at the University of Iowa College of Public Health, and colleagues, people who have been exposed to pyrethroid insecticides are three times more likely to die from cardiovascular disease than those wit...

Your smartphone, television and computer screens may be contaminating your home with potentially toxic chemicals, a new study suggests.

An international team of researchers found the chemicals -- called liquid crystal monomers -- in nearly half of dozens of samples of household dust they collected.

Liquid crystal monomers are used in a wide number of products ranging from fl...

There's one type of green Christmas that's likely to bring joy to gift-givers and recipients alike, a new Canadian study suggests.

That's one based on green consumerism -- a push to buy gifts produced in ways that protect the natural environment.

For this study, researchers at Concordia University in Montreal asked volunteers how a number of green and not-green products mad...

Rising obesity rates worldwide may be contributing to the climate crisis, researchers report.

"Our analysis suggests that, in addition to beneficial effects on morbidity, mortality and health care costs, managing obesity can favorably affect the environment as well," said study corresponding author Faidon Magkos, from the department of nutrition, exercise and sports at the University ...

Toddlers have an increased risk of allergies if they are exposed to multiple indoor pollutants in their first years of life, a new study finds.

It included 108 mother-child pairs. Researchers assessed exposures to various household pollutants such as pet dander and tobacco smoke while the women were pregnant, then when children were aged 6 months, 1 year and 2 years.

A skin ...

The risk of new superbugs that pose a threat to human health and food crops is much higher than previously thought, new genetic research shows.

There's been an uptick in the number of laboratory studies showing how just one mutation could create highly infectious or "hypervirulent" strains of disease-causing bacteria, fungi and water molds.

These include microbes that cause ...

If you are pregnant and live in a rural area of the United States, new research shows that you're at higher risk of life-threatening complications or death during or after childbirth.

"Our study suggests that geographic disparities may put rural women at an increased risk of requiring lifesaving interventions during or immediately after delivering a baby," said study senior author Dr....

Everyone quickly shoos houseflies off their dinner plates, but exactly how disease-ridden are these pesky insects?

New research reveals that flies do pick up plenty of microbes from the nearby environment -- germs that can then be transmitted to your food or drink.

But there's also reason to relax: Experts agreed that houseflies don't rank high on the list of disease threats...

Antarctica is one of the loneliest places on Earth.

Endless expanses of white give way to almost complete darkness during the long winter months. Companionship is largely limited to those who've joined you in these achingly cold wilds.

That overwhelming isolation is so great that it appears to cause physical and functional deterioration in the human brain, a new study shows....

Rising temperatures might help trigger premature birth, a new study finds, suggesting that global warming could deliver more "preemie" babies.

Looking at 20 years of data on heat waves and birth timing across the United States, researchers "estimate that an average of 25,000 infants per year were born earlier as a result of heat exposure."

Taken another way, the research sug...

Even a little exposure to the fine particles of air pollution can translate into higher hospitalization rates for a number of common conditions among older Americans, a new study suggests.

"The study shows that the health dangers and economic impacts of air pollution are significantly larger than previously understood," said study author Yaguang Wei, a doctoral candidate at the Harva...

Lab-altered mosquitoes have made a big dent in the spread of dengue fever, researchers report.

How? Australian scientists released mosquitoes carrying a bacteria that prevents transmission of the dengue virus.

The strategy resulted in a 76% decrease in dengue transmission in a community in Indonesia that has frequent dengue outbreaks. Similar reductions were seen in an u...

Climate change has increased the size, strength and destructive force of hurricanes that strike the United States, according to a new Danish study.

It also reported that the most severe hurricanes are more than three times as common as they were 100 years ago.

The conclusions are based on a new way of analyzing historical hurricane data.

Scientists at the Universi...

Taking that trek through the woods with your child may do more than build strong muscles.

New research suggests that time spent in nature is also good for their mental and emotional well-being.

"This research shows that children experience profound and diverse benefits through regular contact with nature. Contact with the wild improves children's well-being, motivation and c...

Many people who tried going meatless one day a week to call attention to food and climate change continued after the campaign ended, a new study says.

Researchers surveyed 320 households from Bedford, N.Y., that took part in the town's "Meatless Monday" campaign in 2018. For 12 weeks, participants ate no meat one day a week.

In a survey six months later, nearly 57% of re...

Children will face more food shortages and infections if climate change continues unchecked, researchers from the World Health Organization and 34 other institutions warn.

Climate change is already harming children's health. And they're at risk for lifelong health threats unless the world meets Paris Agreement targets to limit warming to well below 2 degrees Celsius, the scientists re...

Don't count on potted plants to keep your home's air clean.

Dispelling a common belief, researchers at Drexel University in Philadelphia found that natural ventilation does a far better job than houseplants in maintaining air quality in homes and offices.

"This has been a common misconception for some time. Plants are great, but they don't actually clean indoor air quickly e...

Rural Americans die more often from potentially preventable causes than their urban counterparts, a new government study shows.

These causes include cancer, heart disease, injury, respiratory disease and stroke, according to U.S. Centers for Disease Control and Prevention research.

Between 2010 and 2017, rural counties saw a widening disparity in preventable deaths from c...

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