Ozone was found to react with tetrahydrocannabinol (THC), the psychoactive component of cannabis.

Second and third hand smoke
Smoking emits reactive chemicals that remain in the air, known as secondhand smoke, or deposit onto the surfaces known as thirdhand smoke. Thirdhand smoke lingers long after a person stops smoking.
Aaron Wylie and Jonathan Abbatt wanted to characterize the compounds formed when THC, by itself or in cannabis smoke, reacts with ozone in the air.
Study Details
The researchers coated glass and cotton cloth, to simulate windows and clothing, with a THC solution. Then, they exposed the surfaces to concentrations of ozone that could exist in indoor air.
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The team also used a smoking machine to deposit cannabis smoke onto cotton. Upon exposure to ozone, the same three compounds formed at roughly the same rate as observed for the THC-coated cloth.
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Dangers of Thirdhand Smoke
1. Culprit in most cancer cases
2. Causes DNA damage
3. Nicotine residue interacts with air to form carcinogens
4. Children are most at risk
Source-Medindia