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.
The Best Materials to Cover your Greenhouse. 1  Glass: The traditional greenhouse covering, glass is the preferred material for permanence. 2  Film Plastic: Film plastic is one sixth to one tenth of the cost per square foot of a glass covered structure.
There are many types of vegetation that can be used. Sedum is ideal roofing material because it can withstand many harsh conditions including drought, heat, frost, snow, sea, winds etc. Wild flowers can also be used and different colour schemes can be designed for a green roof or a green wall.reen Roofs. The word Green Roof has come to describe a roof which is green in the economic sense. In other words it is energy efficient or sustainable. It has many different names such as a living roof, biodiverse roof, Sedum roof, brown roof, eco-roof, grass roof, turfed roof, etc.