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Articles on Health risks

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Canals carry PFAS into Miami’s Biscayne Bay. Art Wager/E+ via Getty Images

PFAS ‘forever chemicals’ are getting into ocean ecosystems, where dolphins, fish and manatees dine – we traced their origins

Scientists found PFAS hot spots in Miami’s Biscayne Bay where the chemicals are entering coastal waters and reaching the ocean. Water samples point to some specific sources.
Thick wildfire smoke blankets the landscape near Water Valley, Alta., in May 2023. Evidence linking wildfire smoke with adverse health effects has been accumulating for years. THE CANADIAN PRESS/Jeff McIntosh

Wildfire smoke is an increasing threat to Canadians’ health

The notion that wildfire smoke is ‘natural,’ and therefore less harmful than other types of air pollution, is not supported by the evidence. Wildfire smoke has been linked to adverse health effects.
Modifiable risk factors for dementia include high blood pressure, obesity, physical inactivity, diabetes, smoking, excessive alcohol consumption and infrequent social contact. (Shutterstock)

Aging with a healthy brain: How lifestyle changes could help prevent up to 40% of dementia cases

While there is no guarantee of warding off cognitive decline, encouraging people to be physically, mentally and socially active could potentially keep a significant number of dementia cases at bay.
Without home cooling, Phoenix’s weeks with temperatures over 110 F in July 2023 became dangerous. Brandon Bell/Getty Images

Extreme heat is particularly hard on older adults – an aging population and climate change put ever more people at risk

Health and climate change researchers explain the risks and why older adults, even those in northern states, need to pay attention.
The risk of dying from COVID-19 varies from person to person. Jasmin Merdan/Moment via Getty Images

If 1% of COVID-19 cases result in death, does that mean you have a 1% chance of dying if you catch it? A mathematician explains the difference between a population statistic and your personal risk

It’s not entirely accurate to say that you’re more likely to die in a car accident than in a plane crash. Chances are, you’re not the average person.
The new rating system shows that eating the right amount of vegetables can lower your risk of heart disease by nearly 20%. Westend61/Getty Images

How unhealthy is red meat? And how beneficial is it to eat vegetables? A new rating system could help you cut through the health guidelines

Health guidelines can feel contradictory and hard to interpret. But a new star rating system should help consumers and policymakers better parse the evidence behind health risks and outcomes.
Everyday environments and activities, from transportation to screen time to eating, are tailored nearly exclusively to prolonged sitting. (Canva/Unsplash/Pixabay)

Too much sitting is bad for you — but some types are better than others

Too much time sitting is linked to health risks, and also to lower quality of life. But in some contexts, such as reading, playing an instrument or socializing, sitting had positive associations.
Exercise training can improve your physical fitness incrementally in as little as two weeks, making it a viable option for people about to undergo a surgical procedure. (Shutterstock)

‘Prehabilitation’: Training your body for surgery may improve recovery, reduce complications

Physical training before surgery — like breathing exercises or running — boosts the odds of a good outcome. Patients with surgeries postponed during COVID-19 can use the delay for ‘prehabilitation.’

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