This problem is avoided by the use of sodium hypochlorite, which is a relatively inexpensive solution that releases free chlorine when dissolved in water.

A solid form, calcium hypochlorite, releases chlorine on contact with water.

Because they release chlorine or bromine when they break down, they damage the protective ozone layer.

It releases chlorine and turns into copper(I) chloride when heated very hot.

The workers were irradiating plastic wrap when it vaporized, releasing radioactive chlorine into a room, officials said.

Then at those altitudes, they release chlorine and bromine to attack the ozone.

Volcanoes also release chlorine, sulfur dioxide and carbon dioxide, all of which can seriously disrupt the atmosphere.

These chemicals break down in the stratosphere to release free chlorine, highly damaging to the protective ozone shield.

This radiation breaks apart even the sturdy chemicals, releasing free chlorine, which in turn destroys ozone.

When those chemicals are broken down by sunlight they release chlorine, which reacts with the ozone.