During its 6th meeting held in 2013,the COP invited the UNEP, in consultation with WHO, the DDT expert group and the Secretariat, to prepare a road map for the development of locally safe, effective, affordable and environmentally sound alternatives to DDT.
According to a research paper published in 2015, inhaling marijuana smoke could cause a flare-up of asthma symptoms, allergic rhinitis or conjunctivitis. Allergic reactions can develop and worsen over time and can evolve in severity over multiple instances of contact
Lastly, you'll want to push the vapor out from the back of your throat, like you're lightly coughing, and produce a ring out of your mouth
Smoking and Age-Related Macular Degeneration Smoking is the largest modifiable risk factor for age-related macular degeneration