NASA research shows the ozone isn’t faring as well as hoped.
NASA / Via ozonewatch.gsfc.nasa.gov
CCl4 used to be widely used in refrigerators, dry cleaning, fire extinguishers, and aerosol cans, according to the EPA.
The invisible gas was finally restricted under 1987's international treaty, called the Montreal Protocol, to protect our fragile ozone layer from further depletion.
Comedy Central / Via friedchillies.com