Comment on

• The intractable cigarette 'filter problem'.

  Harris B. Harris B. Tob Control. 2011 May;20 Suppl 1(Suppl_1):i10-6. doi: 10.1136/tc.2010.040113. Tob Control. 2011. PMID: 21504917 Free PMC article.
• Tobacco and cigarette butt consumption in humans and animals.

  Novotny TE, Hardin SN, Hovda LR, Novotny DJ, McLean MK, Khan S. Novotny TE, et al. Tob Control. 2011 May;20 Suppl 1(Suppl_1):i17-20. doi: 10.1136/tc.2011.043489. Tob Control. 2011. PMID: 21504918 Free PMC article. Review.
• Whose butt is it? tobacco industry research about smokers and cigarette butt waste.

  Smith EA, Novotny TE. Smith EA, et al. Tob Control. 2011 May;20 Suppl 1(Suppl_1):i2-9. doi: 10.1136/tc.2010.040105. Tob Control. 2011. PMID: 21504919 Free PMC article.
• Smoke-free college campuses: no ifs, ands or toxic butts.

  Sawdey M, Lindsay RP, Novotny TE. Sawdey M, et al. Tob Control. 2011 May;20 Suppl 1(Suppl_1):i21-4. doi: 10.1136/tc.2010.040139. Tob Control. 2011. PMID: 21504920 Free PMC article.
• Toxicity of cigarette butts, and their chemical components, to marine and freshwater fish.

  Slaughter E, Gersberg RM, Watanabe K, Rudolph J, Stransky C, Novotny TE. Slaughter E, et al. Tob Control. 2011 May;20 Suppl 1(Suppl_1):i25-9. doi: 10.1136/tc.2010.040170. Tob Control. 2011. PMID: 21504921 Free PMC article.
• Analysis of metals leached from smoked cigarette litter.

  Moerman JW, Potts GE. Moerman JW, et al. Tob Control. 2011 May;20 Suppl 1(Suppl_1):i30-5. doi: 10.1136/tc.2010.040196. Tob Control. 2011. PMID: 21504922 Free PMC article.
• Tobacco litter costs and public policy: a framework and methodology for considering the use of fees to offset abatement costs.

  Schneider JE, Peterson NA, Kiss N, Ebeid O, Doyle AS. Schneider JE, et al. Tob Control. 2011 May;20 Suppl 1(Suppl_1):i36-41. doi: 10.1136/tc.2010.041707. Tob Control. 2011. PMID: 21504923 Free PMC article.
• Geographic patterns of cigarette butt waste in the urban environment.

  Marah M, Novotny TE. Marah M, et al. Tob Control. 2011 May;20 Suppl 1(Suppl_1):i42-4. doi: 10.1136/tc.2010.042424. Tob Control. 2011. PMID: 21504924 Free PMC article.
• Regulating the disposal of cigarette butts as toxic hazardous waste.

  Barnes RL. Barnes RL. Tob Control. 2011 May;20 Suppl 1(Suppl_1):i45-8. doi: 10.1136/tc.2010.041301. Tob Control. 2011. PMID: 21504925 Free PMC article.