When you buy an air purifiers, be sure to buy one that meets EPA air quality guidelines

When you bought an air-purifier in the past, you probably thought it would protect you from the elements.

But a new study suggests the air purification system could be harmful to your health, especially in cities with high levels of pollution.

The EPA’s new Air Quality Index, which ranks cities based on air quality, also found that the most polluted cities have the worst air quality.

The results show that air purifying systems can harm your health.

The study is based on a new analysis of more than 40,000 pollution measurements in more than 50 U.S. cities from 2007 to 2012.

In many cases, pollution from the industry was measured by using air monitors and sensors.

But in other cases, people who owned and operated those systems were included in the analysis.

For example, in the study, the most contaminated cities included in its study had the highest levels of PM10, which is a type of particle that can cause asthma, bronchitis and other respiratory ailments.

PM10 is an ingredient in many air purifiesers.

But the study also found air purifyers with more than 10,000 ppm of PM2.5, or tiny particles smaller than 2.5 microns, had higher PM10 levels than those with less than 1,000 mg.

The average concentration of PM-10 in a normal human is about 300 micrograms per cubic meter.

The highest concentration in the air was in an air conditioner in a Philadelphia suburb, which measured 2,723.67 microgram per cubic metre.

In the city of Houston, the average concentration was 2,903.38 microgram.

The pollution level in those two cities was also among the highest in the country, according to the report.

The city of San Francisco had the second highest level of PM 10 in its analysis, at 8,619.89 microgram, while Washington, D.C. had the third highest, at 2,953.14 microgram at the city’s air quality testing facility.

A lot of people think of air purified air as a safe alternative to regular air, said Dr. Richard Kallman, a professor of environmental health sciences at the University of New Mexico.

“However, many people have a misconception that air-quality measures like PM10 are safe,” Kallon said.

“Many people don’t realize that the concentrations of air pollutants in a healthy person’s body can affect their immune system, the development of asthma and other diseases.”

Dr. Peter Gans, an assistant professor of respiratory medicine at the Icahn School of Medicine at Mount Sinai in New York City, said that the air quality data for some cities might be more indicative of a health issue than the data for others.

“In cities with higher PM levels, we would expect more people to develop asthma or bronchiolitis or chronic bronchial disease, which can have a profound impact on their quality of life,” Gans said.

For instance, people with asthma are more likely to have air pollution in their homes than people without asthma.

And people with chronic bronchiectasis, a condition in which inflammation of the airways leads to chronic cough, also are more at risk for air pollution, Kallons study said.

The new study was published in the journal Environmental Health Perspectives.

A previous study, published in 2012, found that air pollution can cause serious health problems in people with allergies and asthma.

The findings from the new study may help scientists better understand how air pollution affects the health of people with allergy or asthma.

It’s important to note that the study included only people who lived in those cities, Kavli said.

There were no controls, he added.

Kavlis said the new analysis also showed that the pollution levels were higher in people who used the most expensive air purger in the sample.

The most expensive model tested in the current study was the $2,499 Philips Air Purifier II, which costs about $6,500.

Kallan and Kavillas study also showed a correlation between air pollution levels and people’s income.

The analysis showed that people who earned $60,000 or more in the metro area had a higher concentration of the pollutants.

People who made between $25,000 and $49,999 had higher levels of the chemicals in their bodies.

Those who earned between $30,000 to $49.999 had lower levels of air pollution than those who made $40,000, $50,000 — or $50 million.

The next step for Kaviles study is to compare the pollution data for people living in more polluted cities with the pollution level data for the same people living less polluted cities.

The scientists will also examine air pollution measurements over the course of years to see if the pollution increases in response to new regulations.

Kivili said he is excited to be working with

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