In DSM, nicotine dependence is included under the general definition of substance dependence.  The essential feature of Substance Dependence is a cluster of cognitive, behavioral, and physiologic symptoms indicating that the individual continues use of the substance despite significant substance-related problems.
Greenhouse Covering. Whether you're replacing existing greenhouse coverings or building a greenhouse you're sure to find the best greenhouse covering at FarmTek. Greenhouse glazing is the material that covers the greenhouse frame and the most widely used materials are polycarbonate and poly film.
Lean to Wooden Greenhouses not only look amazing with their traditional looks and craftsmanship, theyâre also very tough and wind resistant. We offer the 4ft wide Swallow Finch, the 6ft wide Swallow Dove and the huge 8ft wide Swallow Heron.