The 1987 international Montreal Protocol banned many of the chlorine compounds used in refrigerants and aerosols, like hairspray, to lessen the damage. Since then, the size of the ozone hole has slowly declined but remains large enough to produce significant ozone loss.

The napkins are chlorine-free.

Fluorine, chlorine, bromine, iodine and astatine are halogens.

The current ozone hole area is still large compared to the 1980s, when the depletion of the ozone layer above Antarctica was first detected. This is because levels of ozone-depleting substances like chlorine and bromine remain high enough to produce significant ozone loss.

First detected in 1985, the Antarctic ozone hole forms during the Southern Hemisphere’s late winter as the returning sun’s rays catalyze reactions involving man-made, chemically active forms of chlorine and bromine. These reactions destroy ozone molecules.

Putting chlorine in drinking water is the biggest advance in public health.

Table salt is composed of sodium and chlorine atoms.

There's a chance that tap water may contain harmful substances like chlorine and lead.

Chlorine is one of the elements in the periodic table.

It's possible that the drinking water has chlorine, lead, or similar contaminants in it.