photocatalyst" [18].produce electricity when in nanoparticle form. Research suggests that by using these nanoparticles to form the pixels of a screen, they generate electricity when transparent and under the influence of light. If subjected to electricity on the other hand, the nanoparticles blacken, forming the basic characteristics of a LCD screen. According to creator Zoran Radivojevic, Nokia has already built a functional 200-by-200-pixel monochromatic screen which is energetically self-sufficient.In 1995 the Research Institute of Toto Ltd.  discovered the superhydrophilicity phenomenon for glass coated with titanium dioxide and exposed to sun light. A discovery by Professor Fujishima and his group [17] This resulted in the development of self-cleaning glass and anti-fogging coatings.TiO2 incorporated into outdoor building materials, such as paving stones in noxer blocks or paints, can substantially reduce concentrations of airborne pollutants such as volatile organic compounds 