Supra-aural

Supra-aural headphones are much like circumaural; only the pads go away on top of the ear, making them lighter and smaller. They may have circled pads, much like circumaural headphones, only smaller and go on top of the ear. They may also have basic, "open" pads. They were commonly bundled with personal stereos during the 1980s.

Pollutants in water

Pollutants in water consist of a large spectrum of chemicals, pathogens, and physical chemistry or sensory changes. A lot of the chemical substances are toxic. Pathogens can apparently produce waterborne diseases in either human or animal hosts. Alteration of water’s physical chemistry includes acidity, conductivity, temperature, and eutrophication. Eutrophication is the fertilization of surface water by nutrients that were previously scarce. Even many of the municipal water supplies in developed countries can present health risks.

Salad

Salad is a light meal — or, as part of a larger meal, much more of an taster — consisting of mixed vegetables (usually including at least one leaf vegetable) or fruit, frequently with a dressing or sauce, occasionally nuts and sometimes with the addition of meat, fish or cheese. It is generally seen as a healthy dish, although not always low in calories, salt, sugar, or fat because of the dressing that is often added. The word "salad" comes from the French salad of the same meaning, which in twist is from the Latin salata, "salty", from sal, "salt".

A Personal portal

A Personal portal is a site on the World Wide Web that characteristically provides personalized capabilities to its visitors, given that a pathway to other content. It is intended to use distributed applications, different numbers and types of middleware and hardware to provide services from a number of different sources. In addition, business portals are intended to share collaboration in workplaces. A further business-driven requirement of portals is that the content be able to work on multiple platforms such as personal computers, personal digital assistants (PDAs), and cell phones.

Topiary

Topiary is the art of creating sculptures using clipped trees, shrubs and sub-shrubs. The word derives from the Latin word for an ornamental landscape gardener, topiarius, creator of topia or "places", a Greek word that Romans applied also to fictive indoor landscapes executed in fresco. No doubt the use of a Greek word betokens the art's origins in the Hellenistic world that was influenced by Persia, for neither Classical Greece nor Republican Rome developed any complicated tradition of artful pleasure grounds.
The plants used in topiary are evergreen, have small leaves or needles, produce dense foliage, and have compact and/or columnar growth habits. Common plants used in topiary comprise cultivars of box, arborvitae, bay laurel, holly, myrtle, yew, and privet. Shaped wire cages are sometimes working in modern topiary to guide untutored shears, but traditional topiary depends on patience and a steady hand; small-leaved ivy can be used to cover a cage and provide the look of topiary in a few months.