Study: Particles in Wildfire Smoke May Increase Dementia Risk
2024-08-09
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1A new study suggests that particles found in wildfire smoke could increase the risk of getting dementia.
2Dementia is a progressive brain condition that causes thinking problems and other health issues.
3There are several forms of dementia, including Alzheimer's disease.
4Researchers reported the new findings about wildfire smoke at the recent Alzheimer's Association International Conference in Philadelphia, Pennsylvania.
5The study centered on a substance called PM2.5.
6The substance is known as particulate matter, a mixture of small, solid particles and water droplets found in the air.
7PM2.5 particles are about 30 times smaller than a human hair.
8They can be breathed into the lungs and then move on to the blood stream.
9Existing evidence shows this kind of pollution - from traffic, factories and fires - can cause or worsen heart disease.
10The new study finds it could also raise dementia risks.
11Claire Sexton is the director of scientific programs for the Alzheimer's Association.
12She said in a statement the study shows that increasing wildfires, especially in the American west, are "an increasing threat to brain health."
13Sexton added that the findings demonstrate "the importance of enacting policies to prevent wildfires and investigating better methods to address them."
14Researchers from the University of Washington and the University of Pennsylvania carried out the study.
15They examined health records of 1.2 million older adults in Southern California between 2009 and 2019.
16The scientists used air quality monitoring and other data to estimate how much PM2.5 was released from wildfire smoke or other ways over three years.
17The study found the risk of being diagnosed with dementia increased about 21 percent for every 1 microgram increase in the concentration of wildfire particles.
18That compared with a 3 percent increased risk for every 3 microgram increase in non-wildfire particles.
19It is not clear why this difference exists.
20But with wildfires increasing, this issue needs more study, said Alzheimer's Association chief science officer Maria Carrillo.
21She said it is especially important because the risk of Alzheimer's - the most common form of dementia - is higher for lower-income populations who may have a harder time avoiding unhealthy air.
22Carrillo noted that health warnings urge staying indoors when air quality is poor.
23But she added, "there are a lot of people who don't have the option to stay home or they work outside."
24I'm Bryan Lynn.
1A new study suggests that particles found in wildfire smoke could increase the risk of getting dementia. 2Dementia is a progressive brain condition that causes thinking problems and other health issues. There are several forms of dementia, including Alzheimer's disease. 3Researchers reported the new findings about wildfire smoke at the recent Alzheimer's Association International Conference in Philadelphia, Pennsylvania. 4The study centered on a substance called PM2.5. The substance is known as particulate matter, a mixture of small, solid particles and water droplets found in the air. 5PM2.5 particles are about 30 times smaller than a human hair. They can be breathed into the lungs and then move on to the blood stream. Existing evidence shows this kind of pollution - from traffic, factories and fires - can cause or worsen heart disease. The new study finds it could also raise dementia risks. 6Claire Sexton is the director of scientific programs for the Alzheimer's Association. She said in a statement the study shows that increasing wildfires, especially in the American west, are "an increasing threat to brain health." Sexton added that the findings demonstrate "the importance of enacting policies to prevent wildfires and investigating better methods to address them." 7Researchers from the University of Washington and the University of Pennsylvania carried out the study. They examined health records of 1.2 million older adults in Southern California between 2009 and 2019. The scientists used air quality monitoring and other data to estimate how much PM2.5 was released from wildfire smoke or other ways over three years. 8The study found the risk of being diagnosed with dementia increased about 21 percent for every 1 microgram increase in the concentration of wildfire particles. That compared with a 3 percent increased risk for every 3 microgram increase in non-wildfire particles. 9It is not clear why this difference exists. But with wildfires increasing, this issue needs more study, said Alzheimer's Association chief science officer Maria Carrillo. She said it is especially important because the risk of Alzheimer's - the most common form of dementia - is higher for lower-income populations who may have a harder time avoiding unhealthy air. 10Carrillo noted that health warnings urge staying indoors when air quality is poor. But she added, "there are a lot of people who don't have the option to stay home or they work outside." 11I'm Bryan Lynn. 12The Associated Press reported this story. Bryan Lynn adapted the report for VOA Learning English. 13_________________________________________________ 14Words in This Story 15address - v. to speak about a particular subject or issue 16monitor - v. to watch something carefully and record the results 17diagnose - v. to say what is wrong with a person who is sick 18concentration - n. a large number or amount of something in the same place 19option - n. something that may be chosen