This ppt is useful.
https://powerprt.files.wordpress.com/2013/07/cl-v-what-if-it-finishes-nagarajrao.ppt
Answer the following:-
1.How is Petroleum obtained? Name some petroleum products.
(Refer pg 114)
2.What will happen if we don't get petrol and diesel?
3.Suggest some ways to save petrol?
4.What is the full form of LPG and CNG?
5.Name some renewable and non-renewable sources of energy.
6.Give two differences between chulha and gas stove.
7.What are the difficulties faced by people who use chulha in villages?
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