Asphalt breath" refers to the health hazards, particularly respiratory issues, from inhaling asphalt fumes, but it can also refer to specific cannabis strains like Asphalt Breath or Gasbreath (Gasphalt), known for their potent, relaxing, and sometimes fuel-like aroma and effects, with Asphalt Breath often being a hybrid with deep body relaxation. For occupational health, it means lung damage (reduced lung function, bronchitis) and irritation from fumes; for cannabis, it's about potent, sedative Indica-leaning effects.