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microbiologist with a tube of biological sample contaminated by Coronavirus with label Covid-19 / doctor in the laboratory with a biological tube for analysis and sampling of Covid-19 infectious disea
Wastewater sewage pipe dumps the dirty contaminated water into the river. Water pollution, environment contamination concept
Global warming concept. Industrial factory polluting air with smoke outdoors, aerial view
Asian elderly people wearing protective mask,using alcohol antiseptic gel,prevent infection,outbreak of Covid-19,senior woman washing hand with hand sanitizer to avoid contaminating with Coronavirus
Toxic chemical gas leak safety team working cleaning in danger factory workshop environment contamination safety and protection

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