co2 sign. co2 warning sign. yellow triangle sign with co2 icon. air pollution. oxygen. health hazard. co2 hazard due to poor

co2 sign warning icon symbol dioxide carbon pollution danger vector emission air gas exhaust eco isolated environment ecology black illustration atmosphere ecological triangle cut stop safety car oxygen caution climate risk white button smoke yellow attention security sustainability save road prohibited forbidden reduce global restricted label information health hazard due poor ventilation leakage sign icon pollution oxygen hazard