1) In general, an intermediary is a person or service that is involved as a third party between two or more end points in a communication or transaction.n the World Wide Web, the role of an intermediary is sometimes said to be no longer necessary as, for example, when you look up legal or medical information directly yourself or when you share files with other Internet users directly (see peer-to-peer).
A roof covers a building or home structure, protecting any belongings found within. There are a large number of materials that can be used to roof a building or home, including several types of metal roofing materials. These materials include steel, aluminum, copper and tin.
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.