Arun lives in an eco-friendly house. All rooms in his house are cross ventilated and well lit with sun s light. He has installed solar panels on roof top and also used solar devices like solar cooker, solar water heater etc. Although he has spent some more money initially on these installations, yet he is happy now.
(i) State the reason behind Arun's happiness.
(ii) Which element is used in fabricating solar cells ?
(iii) What inspirations should we take from Arun ?
