Dr Jain's family has four cars and they use all of them everyday creating lot of pollution whereas Mr. Lalit Jain despite having two cars, takes metro or other means of public transport to reach his place of work.
(i) What kind of polluting gases are emitted by motor vehicles?
(ii) How can we decrease carbon monoxide gas in the atmosphere?
(iii) What values are possessed by Mr. Lalit Jain?

Sonu and Nilesh were friends. In winters, one day when they were going to school at 10:00 am Sonu felt irritation in his eyes and throat. He was also unable to breath.
Nilesh immediately took him to a doctor. Doctor gave him the proper remdy. When he became well, Nilesh asked reason for this Doctor answered him satisfactorily.
(i) Can you guess what reason was given by the doctor for the illness of Sonu.
(ii) Why such kind of polluting atmospheric change occurs?
(iii) What should be done to prevent the formation of smog?
(iv) What values are possessed by Nilesh?

Mr. Grover owner of a dry cleaning shop, was using terachloromethane eralier as a solvent for dry-cleaning. The compound containers the ground water and is also suspected carcinogenic. Mr. Raj owner of another dry cleaning shop is using CO ₂ these days.
Hydrogen peroxide is being used for bleaching purpose.
(i) What is the advantages of using liquid Co₂ with suitable detergent for dry-cleaning?
(ii) What is the advantage of using H₂O₂ as bleaching agent?
(iii) What values are possessed by Mr. Raj?

Water is essential for life and we cannot imagine our life without it. Municipal and Industrial discharge lead to water pollution. Organic wastes also create water pollution. Heavy metals from industries create lot of water pollution.
Immersion of a statues of during festivals, create lot of water pollution.
The residents of Chitranjan Park decided no to put Durga statue into Yamuna river like every year. This step was highly appreciated by Delhi Govternment, and the NGO 'Save Yamuna Project'.
(i) What should be done to reduce water pollution? Give three ways.
(ii) What is the effect of water pollution?
(iii) What is the threat for aquatic animals due to water pollution?
(iv) What values are possessed by the residents of Chitranjan Park?