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2. List of smoking bans - Wikipedia

   en.wikipedia.org/wiki/List_of_smoking_bans

   On 30 July 2012, Interior Minister Prince Ahmed bin Abdulaziz ordered the implementation of a royal ban on smoking in all government facilities (ministries, buildings, institutions, offices etc.) and most indoor public places. The ban also prohibits smoking of hookahs in public places, and prohibits selling tobacco to anyone under 18.

3. Carbon dioxide - Wikipedia

   en.wikipedia.org/wiki/Carbon_dioxide

   The critical point is 304.128(15) K (30.978(15) °C) at 7.3773(30) MPa (72.808(30) atm). Another form of solid carbon dioxide observed at high pressure is an amorphous glass-like solid. [28] This form of glass, called carbonia , is produced by supercooling heated CO 2 at extreme pressures (40–48 GPa , or about 400,000 atmospheres) in a ...

4. 420 (cannabis culture) - Wikipedia

   en.wikipedia.org/wiki/420_(cannabis_culture)

   420, 4:20 or 4/20 (pronounced four-twenty) is cannabis culture slang for marijuana and hashish consumption, especially smoking around the time 4:20 p.m. (16:20). It also refers to cannabis -oriented celebrations that take place annually on April 20 (4/20 in U.S. date form).