![File:A protester wearing breathing gas mask. Clashes between protesters and interior troops persist. Euromaidan Protests.jpg - Wikimedia Commons File:A protester wearing breathing gas mask. Clashes between protesters and interior troops persist. Euromaidan Protests.jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/6/62/A_protester_wearing_breathing_gas_mask._Clashes_between_protesters_and_interior_troops_persist._Euromaidan_Protests.jpg)
File:A protester wearing breathing gas mask. Clashes between protesters and interior troops persist. Euromaidan Protests.jpg - Wikimedia Commons
![A demonstrator wears a gas mask as federal officers deploy tear gas during a Black Lives Matter … | Las Vegas Review-Journal A demonstrator wears a gas mask as federal officers deploy tear gas during a Black Lives Matter … | Las Vegas Review-Journal](https://www.reviewjournal.com/wp-content/uploads/2020/07/14024055_web1_14024055-8095421a561041179b927fabbb5ba149.jpg)
A demonstrator wears a gas mask as federal officers deploy tear gas during a Black Lives Matter … | Las Vegas Review-Journal
![Security forces airman accused of trying to burn cop car during protests while wearing Air Force gas mask Security forces airman accused of trying to burn cop car during protests while wearing Air Force gas mask](https://www.airforcetimes.com/resizer/N73sMEBXYBE-eYCfrT7pYWLEBp4=/1024x0/filters:format(jpg):quality(70)/cloudfront-us-east-1.images.arcpublishing.com/archetype/QWCKNJ45UVDVHBC7GL5QK2WIL4.jpg)
Security forces airman accused of trying to burn cop car during protests while wearing Air Force gas mask
![People from different culture and races protest for equal rights - Demonstrators wearing face and gas masks People from different culture and races protest for equal rights - Demonstrators wearing face and gas masks](https://as1.ftcdn.net/v2/jpg/03/59/18/32/1000_F_359183271_dLXOveTBd5oQYM22m5vatzL3WY68JTXm.jpg)
People from different culture and races protest for equal rights - Demonstrators wearing face and gas masks
![Person Wearing Gas Mask Holding The Planet Stock Photo - Download Image Now - Climate, Protest, Climate Change - iStock Person Wearing Gas Mask Holding The Planet Stock Photo - Download Image Now - Climate, Protest, Climate Change - iStock](https://media.istockphoto.com/id/1204168594/photo/person-wearing-gas-mask-holding-the-planet.jpg?s=612x612&w=is&k=20&c=r4cPRgsWOW7NM0RG52P_KzjnSODzSlukskoV7a2OObM=)
Person Wearing Gas Mask Holding The Planet Stock Photo - Download Image Now - Climate, Protest, Climate Change - iStock
![Activist Wearing Gas Mask Protesting Against Racism And Fighting For Equality Protests Demonstration On Street For Justice And Equal Rights Protest International Movement Concept Stock Photo - Download Image Now - iStock Activist Wearing Gas Mask Protesting Against Racism And Fighting For Equality Protests Demonstration On Street For Justice And Equal Rights Protest International Movement Concept Stock Photo - Download Image Now - iStock](https://media.istockphoto.com/id/1259153787/photo/activist-wearing-gas-mask-protesting-against-racism-and-fighting-for-equality-protests.jpg?s=1024x1024&w=is&k=20&c=hjVOb99zLoMo6G3v7o7XNXDW-pcWCFLOz5kPdUzTwT0=)
Activist Wearing Gas Mask Protesting Against Racism And Fighting For Equality Protests Demonstration On Street For Justice And Equal Rights Protest International Movement Concept Stock Photo - Download Image Now - iStock
![Human Protest Doll With Gas Mask Kiev Ukraine Stock Photo - Download Image Now - Accuracy, Built Structure, Candid - iStock Human Protest Doll With Gas Mask Kiev Ukraine Stock Photo - Download Image Now - Accuracy, Built Structure, Candid - iStock](https://media.istockphoto.com/id/509731620/photo/human-protest-doll-with-gas-mask-kiev-ukraine.jpg?s=1024x1024&w=is&k=20&c=e51AjmLZG58uft3QaBD-Mf6B723pgnvQr7S9OTNF3_s=)
Human Protest Doll With Gas Mask Kiev Ukraine Stock Photo - Download Image Now - Accuracy, Built Structure, Candid - iStock
![CrimethInc. : A Demonstrator's Guide to Gas Masks and Goggles : Everything You Need to Know to Protect Your Eyes and Lungs from Gas and Projectiles CrimethInc. : A Demonstrator's Guide to Gas Masks and Goggles : Everything You Need to Know to Protect Your Eyes and Lungs from Gas and Projectiles](https://cdn.crimethinc.com/assets/articles/2020/09/02/10.jpg)
CrimethInc. : A Demonstrator's Guide to Gas Masks and Goggles : Everything You Need to Know to Protect Your Eyes and Lungs from Gas and Projectiles
![A demonstrator wearing a gas mask protest during a summit on brown coal in Leuna, Germany, 27 February 2012. Experts from politics, science and economy meet to discuss on energetically significant usage A demonstrator wearing a gas mask protest during a summit on brown coal in Leuna, Germany, 27 February 2012. Experts from politics, science and economy meet to discuss on energetically significant usage](https://c8.alamy.com/comp/D6H1M4/a-demonstrator-wearing-a-gas-mask-protest-during-a-summit-on-brown-D6H1M4.jpg)
A demonstrator wearing a gas mask protest during a summit on brown coal in Leuna, Germany, 27 February 2012. Experts from politics, science and economy meet to discuss on energetically significant usage
![People from different culture and races protest on for no racism and equal rights - Demonstrators wearing People from different culture and races protest on for no racism and equal rights - Demonstrators wearing](https://as1.ftcdn.net/v2/jpg/03/59/18/32/1000_F_359183287_x585EHrFAkGruFLwwaHx6YOIGtdn0GZn.jpg)
People from different culture and races protest on for no racism and equal rights - Demonstrators wearing
![A protester wearing a gas mask takes part in the 19th of May national strike. in Bogotá.Plaza de Los Heroes (Heroes square) in Bogotá, was one of the 40 points of demonstration A protester wearing a gas mask takes part in the 19th of May national strike. in Bogotá.Plaza de Los Heroes (Heroes square) in Bogotá, was one of the 40 points of demonstration](https://c8.alamy.com/comp/2FPKCKA/a-protester-wearing-a-gas-mask-takes-part-in-the-19th-of-may-national-strike-in-bogotplaza-de-los-heroes-heroes-square-in-bogot-was-one-of-the-40-points-of-demonstration-during-the-19th-of-may-national-strike-a-total-of-fifteen-thousand-people-took-part-in-the-strike-on-the-22nd-day-of-protest-the-protests-in-different-parts-of-the-country-began-to-oppose-tax-reform-police-have-responded-with-extreme-violence-and-the-demands-have-multiplied-as-the-economic-crisis-sharpen-photo-by-antonio-casciosopa-imagessipa-usa-2FPKCKA.jpg)
A protester wearing a gas mask takes part in the 19th of May national strike. in Bogotá.Plaza de Los Heroes (Heroes square) in Bogotá, was one of the 40 points of demonstration
![A protester with a gas mask during the protest.Dozens of demonstrators protested at the Landmark shopping mall in Central demanding for the Hong Kong government to close all the borders in Hong A protester with a gas mask during the protest.Dozens of demonstrators protested at the Landmark shopping mall in Central demanding for the Hong Kong government to close all the borders in Hong](https://c8.alamy.com/comp/2ATPJA1/a-protester-with-a-gas-mask-during-the-protestdozens-of-demonstrators-protested-at-the-landmark-shopping-mall-in-central-demanding-for-the-hong-kong-government-to-close-all-the-borders-in-hong-kong-connecting-with-mainland-china-in-order-to-control-the-deadly-corona-virus-from-spreading-into-hong-kong-2ATPJA1.jpg)