alphabet with word cfc abbreviation of chlorofluorocarbon in black line hand drawing as bubble speech on white board

abbreviation advertisement air alphabet atmosphere background ban banner black board bubble business certified cfc chemical chlorofluorocarbon compound concept copy danger dangerous depletion design drawing earth element environment equipment free gas global guarantee hand harmful hazard health hydrocarbon industry label letter line material montreal ozone planet pollution production protocol qualified safety science space speech spray volatile warming white word