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Other symptoms of toxicity are coughing and drowsiness, and chronic exposure can cause cancer
Long-term relief from excessive burping comes from eliminating those pesky air-adding habits, as well as treating your underlying cause

Thomas Mason, 16, thinks they're beneficial
It estimates the total volume of air a person inhales over a set period (e.g., 24 hours), multiplies it by the concentration of PM2.5 in the air (reported via the AQI), and calculates the total mass of particles inhaled

Tobacco is also at risk of autolysis, rotting, mold, and self-heating