The World Health Organisation has revealed that tobacco waste contains over 7000 toxic chemicals that poison the environment, including human carcinogens.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/gambia-tobacco-waste-contains-over-7000-toxic-chemicals-who-reveals
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/all-africa
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/tobacco
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environment
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/who
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/hazardous-waste
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/green-house-gases