You might want to think twice about lighting your wood- or coal- burning stove Feb. 16. The day has been declared Air Quality Day in Utah County.

The Utah County commissioners passed the declaration in conjunc-tion with an air quality symposium at Brigham Young University Thursday.The symposium will be from 8:30 a.m. to 5:30 p.m. in 375 Wilkinson Center.

Hugh Nibley will give the keynote address, "Stewardship and the Earth: Ancient Follies and Modern," at 1 p.m. Botany professor Sam Rushforth will speak that morning at 9:10 a.m. about polluters, pollutants and health effects in Utah Valley.

Economics Professor Arden Pope will discuss his study on "Respiratory Disease Associated with Air Pollution and Geneva Steel" at 11 a.m. and Marius J. Gedgaudas, chief of the compliance section for the EPA air programs branch, will speak at 3 p.m. about the compliance of Geneva Steel to air quality regulations.

Brent Harker, assistant director of BYU Public Communications, said the symposium is not sponsored by the university, but is merely being held on campus by several BYU professors.

County commissioners are asking that all managers of Utah County government departments evaluate county efforts to improve air quality in Utah Valley and to report the results to the commission.

Homeowners with wood- or coal-burning heating systems are asked to consider the effects chimney emissions have on air quality in Utah County and all mayors are asked to consider if local ordinances should be enacted to improve air quality in Utah Valley.

Owners and operators of businesses and industries are also asked to evaluate the impact of emissions from their operations and to develop plans to eliminate or minimize that impact.