The waste water showed high values of total solid (TS), hardness and chloride with slightly alkaline pH along with high concentrations of Cr (2.03 mg l(-1)), Ni (1.59 mg l(-1)) and Zn (0.46 mg l(-1)). The concentration of Cu (0.21 mg l(-1)) and Zn in industrial waste water was low than Ni and Cr. The diluted (25 and 50%), undiluted (100%) waste water was used to irrigate the lettuce plants grow...

The Sahara is the greatest of the world's waste lands which is being opened up as a major tourist attraction, and it is now possible to travel overland from the Mediterranean to the Bight of Benin by public transport during a four week vacation.' Although many publications are available to advise the prospective traveller to the tropics in general, little information is available on medical car...

The performance of 3D graphics hardware and rendering systems is constantly increasing. Despite this development, concerning research, 3D desktop systems are still waste lands compared to their 2D counterparts. Only very few system exist, and those are sparely documented. We are currently designing and implementing a three dimensional virtual desktop. This paper provides insight into the design...

Concern for the potential global change consequences of increasing atmospheric CO has prompted interest in the 2 development of mechanisms to reduce or stabilize atmospheric CO . During the next several decades, a program 2 focused on terrestrial sequestration processes could make a significant contribution to abating CO increases. The 2 reclamation of degraded lands, such as mine-spoil sites, ...

There is a resurgence of interest in controlling the excessive fertilization (eutrophication) of surface waters in order to protect domestic water supplies and other beneficial uses of waters from impairment (pollution) by excessive growths of algae or other aquatic plants whose growth is stimulated by nitrogen and phosphorus. An area of particular concern is the nutrients added to waterbodies ...