| Nanotechnology has a unique opportunity in the history of technology: this could be the first platform technology that introduces a culture of social sensitivity and environmental awareness early in the lifecycle of technology development. Environmental Benefits Paints and coatings have the ability to reduce energy costs , and improve indoor air quality. Surface treatments can significant reduce the use of chemical cleaners and save water and maintenance costs. Less cleaning cycles on a high rising building means also less risk for window or facade cleaners. While exposed surfaces still need cleaning the cleaning frequency can be expanded. Concrete and stone facades can be treated to reduce water absorption. Dry walls are much better insulation against hot and cold weather and this will reduce the energy bills for air condition and heating. Frost damages can be avoided. The over all appearance of any structure will improve. Contamination can be removed much easier and the danger of permanent damage surface through pollution like acid rain is reduce. Water repellent can use water as solvent. No need for VOC's (volatile organic compounds) .
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