(i) (a) Use of coal or nuclear fuel to generate electricity and resulting environmental pollution.
(b) Emission of harmful gases by air-conditioners, refrigerators and its harmful effect on environment.
(ii) (a) Common good/avoidance of wastage of energy.
(b) Environmental care.
(iii) Comparison of monthly bills for electrical energy consumption and creating awareness about minimising the same. Thus saving energy as well as the environmental protection.