Face masks do not increase CO2 levels, even in people with severe lung impairment


		AIR QUALITY WARNING	ISSUED BY: ENVIRONMENT CANADA START DATE: FRIDAY JUL 11, 2025 2:50 PM END DATE: SATURDAY JUL 12, 2025 6:50 AM
		SMOKE IS CAUSING OR EXPECTED TO CAUSE POOR AIR QUALITY AND REDUCED VISIBILITY. PEOPLE MORE LIKELY TO BE AFFECTED BY WILDFIRE SMOKE, INCLUDING PEOPLE AGED 65 AND OLDER, PREGNANT WOMEN, INFANTS AND YOUNG CHILDREN, PEOPLE WITH AN EXISTING ILLNESS OR CHRONIC HEALTH CONDITION, AND PEOPLE WHO WORK OUTDOORS, SHOULD AVOID STRENUOUS ACTIVITIES OUTDOORS AND SEEK MEDICAL ATTENTION IF EXPERIENCING SYMPTOMS. AS SMOKE LEVELS INCREASE, HEALTH RISKS INCREASE. LIMIT TIME OUTDOORS. CONSIDER REDUCING OR RESCHEDULING OUTDOOR SPORTS, ACTIVITIES AND EVENTS. YOU MAY EXPERIENCE MILD AND COMMON SYMPTOMS SUCH AS EYE, NOSE AND THROAT IRRITATION, HEADACHES OR A MILD COUGH. MORE SERIOUS BUT LESS COMMON SYMPTOMS INCLUDE WHEEZING, CHEST PAINS OR SEVERE COUGH. IF YOU THINK YOU ARE HAVING A MEDICAL EMERGENCY, SEEK IMMEDIATE MEDICAL ASSISTANCE. VISIT HTTP://WWW.AIRHEALTH.CA FOR INFORMATION ON HOW TO REDUCE YOUR HEALTH RISK AND YOUR PERSONAL CONTRIBUTION TO POLLUTION LEVELS, AS WELL AS FOR CURRENT AND FORECAST AQHI VALUES. PLEASE CONTINUE TO MONITOR ALERTS AND FORECASTS ISSUED BY ENVIRONMENT CANADA.


		AIR QUALITY WARNING	ISSUED BY: ENVIRONMENT CANADA START DATE: FRIDAY JUL 11, 2025 2:50 PM END DATE: SATURDAY JUL 12, 2025 6:50 AM
		SMOKE IS CAUSING OR EXPECTED TO CAUSE POOR AIR QUALITY AND REDUCED VISIBILITY. PEOPLE MORE LIKELY TO BE AFFECTED BY WILDFIRE SMOKE, INCLUDING PEOPLE AGED 65 AND OLDER, PREGNANT WOMEN, INFANTS AND YOUNG CHILDREN, PEOPLE WITH AN EXISTING ILLNESS OR CHRONIC HEALTH CONDITION, AND PEOPLE WHO WORK OUTDOORS, SHOULD AVOID STRENUOUS ACTIVITIES OUTDOORS AND SEEK MEDICAL ATTENTION IF EXPERIENCING SYMPTOMS. AS SMOKE LEVELS INCREASE, HEALTH RISKS INCREASE. LIMIT TIME OUTDOORS. CONSIDER REDUCING OR RESCHEDULING OUTDOOR SPORTS, ACTIVITIES AND EVENTS. YOU MAY EXPERIENCE MILD AND COMMON SYMPTOMS SUCH AS EYE, NOSE AND THROAT IRRITATION, HEADACHES OR A MILD COUGH. MORE SERIOUS BUT LESS COMMON SYMPTOMS INCLUDE WHEEZING, CHEST PAINS OR SEVERE COUGH. IF YOU THINK YOU ARE HAVING A MEDICAL EMERGENCY, SEEK IMMEDIATE MEDICAL ASSISTANCE. VISIT HTTP://WWW.AIRHEALTH.CA FOR INFORMATION ON HOW TO REDUCE YOUR HEALTH RISK AND YOUR PERSONAL CONTRIBUTION TO POLLUTION LEVELS, AS WELL AS FOR CURRENT AND FORECAST AQHI VALUES. PLEASE CONTINUE TO MONITOR ALERTS AND FORECASTS ISSUED BY ENVIRONMENT CANADA.