Question 1 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1c29cf59b460d7261e117.jpg' /> In the given figure, What percentage of houses used the coal fuel in the year 1976?

Question 2 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1c290f59b460d7261e109.jpg' /> The rates of diesel are different in each city. The rates of diesel in Delhi are given here. Look at the above table and answer the questions. In 2014, as compared to 2007 the rate of diesel increased by --- rupees.

Question 4 :
What are some ways to deal with the problems arising out of the growing number of vehicles?

Question 5 :
What problems can we have from smoke coming out of vehicles?

Question 6 :
Durga lives in a village in Haryana. Everyday she spends many hours collecting wood for the chulha (stove). Her daughter also has to help her in this. For the past three months she has a cough. There is a lot of smoke when damp wood is burnt. But Durga does not have any option. What can Durga use instead of wood?

Question 7 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1c299f59b460d7261e114.jpg' /> Study the above graph and answer. In twenty years, the use of LPG and kerosene increased by ________%.

Question 9 :
In the past 10 years use of which cooking fuel has decreased in your area?

Question 10 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1c29ef59b460d7261e11a.jpg' /> When our elders were young what was then used to cook food at home?