Main theme of case study is to find out the most effective and economical road in the industrial sections to consume enargy and to reduce its cost. besides thiese twos, environment and eco-system are also in our cosiderations. In Bangladesh every year, a lot of energy are consumed in industries and most of the energy sources are imported from abroad and for these we have to pay a lot of foreign currency. By this case study, we also show a way how we can use our domestic energy sources; especially focused on renewable energy. Replacing non-renewable energy by renewable energy is an tough challenge and it becomes tougher when it is need to produce lots of energy because ennergy coefficient of renewable energy is low compared to non-renewable energy.

The objectives of this case study was to study and draw an overview of recent advancement of "PMMA-based Nanocomposite for Self-cleaning Technology". Through this case study, we discuss about the mechanism of self-cleaning property, modes of self-cleaning system, materials and methods used to fabricate self-cleaning surface, recent uses and advantages of PMMA-based nanocomposite, applications of this type of nanomaterials and future challenges. By this case study, enhancement of durability, transparency and photocatalytic activity were also discussed.