**5. Conclusions**

Energy sector needs particular attention to mitigate environmental pollution, particularly for the case of air segment. Environmental degradation, because of consumption of fossil fuels and other primary energy resources in energy sector, has become critical challenge for the today's world. The cost of affordable energy is also growing drastically, which ultimately affects the overall per capita income. The air quality deterioration has also become very complex due to introduction of various new industrial processes and operations. Use of renewable and clean energy resources provides sustainable solution to both problems, i.e., fulfilling the energy requirements as well as mitigation of environmental pollution. Having natural cycle and occurring in the form of natural flux, such techniques have either zero or minimal impacts on the environment.

The future trends for the mitigation of air pollution in line with energy needs are summarized as below:

