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.

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

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

Chlorine is one of the elements in the periodic table.

Of course chlorine can be very toxic.

Man-made chlorine compounds, which can last in the air for 100 years, damage the ozone, creating a gap.

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

Table salt is composed of sodium and chlorine atoms.

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.