You have done good research, and it shows that "cigarette butts" is more commonly used than the other alternative
Helpful Resources Secondhand Marijuana Smoke and Kids
Likewise in Canada or Saskatchewan, the USA has quite similar OSH risk assessment guidelines or practices, criteria for risk assessment teams, risk assessment teams training or qualifications, who can or cannot offer risk assessment training, legislative roles or responsibilities of key personnel in the OSH policies, pre-risk assessment, hazard identification approaches, risk assessment practices, risk control strategies, promotion of communication and consultation regarding the OSH risk management practices, requirements or expectations on documentation and record-keeping, and revision of such OSH risk management practices
Cancer risk is only one of the vaping topics researchers are tackling
These signals say as much about reliability as any glitzy promotion could