According to the serial number of the questions asked in the official question paper of UPSC

Q14. Explain the factors responsible for the origin of ocean currents. How do they influence regional climates, fishing and navigation?

Q15. Mumbai, Delhi and Kolkata are the three Mega cities of the country but the air pollution is much more serious probelm in Delhi as compared to the other two. Why is this so?

Q16. India is well endowed with fresh water resources. Critically examine why it still suffers from water scarcity.

Q17. The states of Jammu and Kashmir, Himachal Pradesh and Uttarakhand are reaching the limits of their ecological carrying capacity due to tourism. Critically evaluate.

Q18. How far do you agree that the behaviour of the Indian monsoon has been changing due to humanizing landscape? Discuss.

Q19. Smart cities in India cannot sustain without smart vilages. Discuss this statement in the backdrop of rural urban integration.

Q20. What are the economic significances of discovery of oil in Arctic Sea and its possible environemental consequences?

Also refer : UPSC MAINS 2015 GS PAPER I https://fotisedu.com/upsc-mains-2015-gs-paper-i/

UPSC MAINS 2015 GS PAPER II https://fotisedu.com/upsc-mains-2015-gs-paper-ii/

UPSC MAINS 2015 GS PAPER III https://fotisedu.com/upsc-mains-2015-gs-paper-iii/

UPSC MAINS 2015 GS PAPER IV https://fotisedu.com/upsc-mains-2015-gs-paper-iv/