The ties to health and biology are numerous. Fire departments Fire departments are excellent source for chemical use in fire fighting and fire retardants. Hazardous waste disposal is another familiar topic. Insurance adjuster Adjusters might speak on some of the recent geological hazards in the area such as hail storms, mudslides, tornadoes, floods, and ice storms. Engineers Engineering is found in all of the sciences.
Many engineering societies provide speakers on numerous topics.
These professionals can provide flowers with broken stems or old flowers for flower studies. Fern leaves complete with sori may be available. Florists may speak on current methods of maintaining cut flowers. Greenhouse owners may discuss plant needs or methods of propagation. Landscape architects More and more landscaping is done with native plants or plants that are highly adapted to the area.