Hi, December's MOTM is sulfur dioxide SO2, which is one of the major components of acid rain. It has been written by Mike Thompson from Uppingham School, and is available in all common formats. http://www.bristol.ac.uk/Depts/Chemistry/MOTM/motm.htm#dec2003 Regards, ----------------------------------------------------------------------------- Dr Paul May, School of Chemistry, University of Bristol, UK tel: +44 (0)117 928-9927 fax: +44 (0)117 925-1295 <mailto:paul.may@bris.ac.uk> Mobile: 07811371539 Home URL: <http://www.bris.ac.uk/Depts/Chemistry/staff/pwm.htm> Molecule of the Month: <http://www.bristol.ac.uk/Depts/Chemistry/MOTM/motm.htm> Bumper sticker: "Where are we going? And why are we in this hand-basket?" ------------------------------------------------------------------------------