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The Indoor Air Quality Star Rating™ Standard

Facts about Air, Resources and References

Confidence in the safety and cleanliness of venues is the top priority for customers.

A recent study* from Tripadvisor found that for consumers thinking about future travel:

  • More than 9 out of 10 (92%) said cleanliness is the most important factor in selecting accommodations.
  • More than 8 in 10 (84%) said cleanliness or sanitization certificates are important when booking a travel experience.
  • Nearly 8 in 10 (79%) said it’s important to publicly display compliance to government safety standards.


Air pollution is the greatest environmental threat to humanity.

Air pollution is now considered to be the world’s largest environmental health threat, accounting for 7 million deaths around the world every year.


Air pollution kills over 7 million of us every year, and causes a number of diseases from asthma to cancer and heart disease.

The combined effects of ambient (outdoor) and household air pollution cause about seven million premature deaths every year, largely as a result of increased mortality from stroke, heart disease, chronic obstructive pulmonary disease, lung cancer and acute respiratory infections.


Over 90% of us are exposed to pollution levels that are above WHO air quality guidelines.

New data from WHO shows that 9 out of 10 people breathe air containing high levels of pollutants. Updated estimations reveal an alarming death toll of 7 million people every year caused by ambient (outdoor) and household air pollution.


Indoor air quality is typically significantly worse than outdoors.

In the last several years, a growing body of scientific evidence has indicated that the air within homes and other buildings can be more seriously polluted than the outdoor air in even the largest and most industrialized cities.


A new study has proven that such products have overtaken cars as a major source of air polluting chemicals.

Household aerosols such as air fresheners, deodorants and furniture polish have overtaken cars as a source of smog polluting chemicals in the UK, a new study has found.


Research has now proven that the air we breathe can harm us from head to toe, including dementia, heart and lung disease, fertility problems and reduced intelligence, potentially damaging every organ and our bodies.

Studies link air pollution with diabetes mellitus prevalence, morbidity, and mortality. Pollution affects the immune system and is associated with allergic rhinitis, allergic sensitization, and autoimmunity. It is also associated with osteoporosis and bone fractures, conjunctivitis, dry eye disease, blepharitis, inflammatory bowel disease, increased intravascular coagulation, and decreased glomerular filtration rate. Atopic and urticarial skin disease, acne, and skin aging are linked to air pollution. Air pollution is controllable and, therefore, many of these adverse health effects can be prevented.


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