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.
Santa Barbara Greenhouse kits are affordable and are true do-it- yourself projects. Fun and easy to assemble. All parts are pre- cut and drilled at the factory. Hardware is sorted and included. Santa Barbara Greenhouses are made of all clear California redwood. Many people ask why we use such beautiful redwood.