Exposure to air pollutants – even at levels below World Health Organization air quality guidelines – may trigger a heart attack within the hour, according to a new study from China that found the risks were highest among older people and when the weather was colder.
The study found exposure to any level of four common air pollutants could quickly trigger the onset of acute coronary syndrome. ACS is an umbrella term describing any situation in which blood supplied to the heart muscle is blocked, such as in a heart attack or unstable angina, chest pain caused by blood clots that temporarily block an artery. The strongest risk occurred within the first hour of exposure and diminished over the course of the day.
Breathing dirty air takes a heavy toll on gut bacteria, boosting risk of obesity, diabetes, gastrointestinal disorders and other chronic illnesses, new University of Colorado Boulder (CU) research suggests.
The study, published online in the journal Environment International, is the first to link air pollution to changes in the structure and function of the human gut microbiome—the collection of trillions of microorganisms residing within us.
The gaseous pollutant ozone, which helps make up Denver’s infamous “brown cloud”—is particularly hazardous, the study found, with young adults exposed to higher levels of ozone showing less microbial diversity and more of certain species associated with obesity and disease.
“We know from previous research that air pollutants can have a whole host of adverse health effects,” said senior author Tanya Alderete, an assistant professor of integrative physiology, pointing to studies linking smog with Type 2 diabetes, weight gain and inflammatory bowel diseases. “The takeaway from this paper is that some of those effects might be due to changes in the gut.”
As a senior citizen whose family has Alzheimer’s Disease and other forms of dementia on both sides, I take these studies very seriously
Living near major roads or highways is linked to higher incidence of dementia, Parkinson’s disease, Alzheimer’s disease and multiple sclerosis (MS), suggests new research published this week in the journal Environmental Health.
Researchers from the University of British Columbia analyzed data for 678,000 adults in Metro Vancouver. They found that living less than 50 meters from a major road or less than 150 meters from a highway is associated with a higher risk of developing dementia, Parkinson’s, Alzheimer’s and MS—likely due to increased exposure to air pollution.
The researchers also found that living near green spaces, like parks, has protective effects against developing these neurological disorders.
They looked at patient data on 131,000 Londoners aged 50 to 79, and based on their residential postcodes, the researchers estimated their yearly exposure to air pollutants. These were specifically nitrogen dioxide, fine particulate matter and ozone, as well as proximity to heavy traffic and road noise, using modelling methods validated with recorded measurements. Continue reading →