Research Article Little grains of sand. Br Med J (Clin Res Ed) 1981; 283 doi: https://doi.org/10.1136/bmj.283.6307.1647 (Published 19 December 1981) Cite this as: Br Med J (Clin Res Ed) 1981;283:1647 Article Related content Metrics Responses Peer review Related articles No related articles found. See more NICE issues guidance on policies to reduce vehicle emissions BMJ December 01, 2016, 355 i6453; DOI: https://doi.org/10.1136/bmj.i6453 Talking trash BMJ November 17, 2016, 355 i5996; DOI: https://doi.org/10.1136/bmj.i5996 Health campaigners welcome government plan to phase out coal power BMJ November 10, 2016, 355 i6066; DOI: https://doi.org/10.1136/bmj.i6066 Five minutes with . . . Matthew Pennycook BMJ November 08, 2016, 355 i5993; DOI: https://doi.org/10.1136/bmj.i5993 WHO urges restrictions on e-cigarettes BMJ November 08, 2016, 355 i5991; DOI: https://doi.org/10.1136/bmj.i5991