Tiny particles or liquid droplets suspended and floating in air, or containers that spray these particles.
From 'aero-' (air) and 'sol' (from Latin solution, meaning dissolved substance). The term was coined in the 1920s-1930s to describe both the floating particles and the spray cans that produce them.
Aerosols were revolutionary for spray technology, but then we discovered the ozone-destroying chlorofluorocarbons (CFCs) in hairspray cans were eating a hole in our atmosphere. This led to one of the biggest environmental victories: the Montreal Protocol that banned CFCs worldwide.
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