New delhi

Indian Air Force "Sarang" helicopter display team performs during the Indian Air Force Day celebrations at the Hindon air force station on the outskirts of New Delhi...Indian Air Force "Sarang" helicopter display team performs during the Indian Air Force Day celebrations at the Hindon air force station on the outskirts of New Delhi October 8, 2013. The IAF celebrated its 81st anniversary on Tuesday.

Anindito Mukherjee/Reuters

Indian Air Force Sarang helicopter display team performs during the Indian Air Force Day celebrations at the Hindon air force station on the outskirts of New Delhi. The IAF celebrated its 81st anniversary on Tuesday.

Baba Din, an elderly member of India's landless, poor farmers and the tribal community, listens to a speaker during a protest at Jantar Mantar, an area near the Indian parliament where citizens from across the country assemble for protests, in New Delhi, India, Thursday, Oct. 3, 2013. The farmers were protesting against government procuring land for setting up industry and not providing enough subsidy to farmers among several other grievances.

Altaf Qadri/AP

Baba Din, an elderly member of India’s landless, poor farmers and the tribal community, listens to a speaker during a protest at Jantar Mantar, an area near the Indian parliament where citizens from across the country assemble for protests, in New Delhi on Thursday. The farmers were protesting against government procuring land for setting up industry and not providing enough subsidy to farmers, among several other grievances.

An Indian man covers his nose as a Delhi municipal worker fumigates the area to prevent mosquitos from breeding after the number of dengue fever deaths in the city rose, in New Delhi, India, Thursday, Sept. 26, 2013. Dengue fever is a potentially serious mosquito-borne virus.

Manish Swarup/AP

An Indian man covers his nose as a municipal worker fumigates the area to prevent mosquitoes from breeding after the number of dengue fever deaths rose in New Delhi. Dengue fever is a potentially serious mosquito-borne virus.

Religious offerings from devotees and leftover wooden frames of Lord Ganesh idols pile up in the Yamuna river in New Delhi on September 20, 2013.  Considered one of the holiest rivers in India, the Yamuna River has been dying a slow death from pollution for decades despite the investment of millions of dollars to preserve its ecosystem. According to the Central Pollution Control Board (CPCB) which monitors the water quality of the Yamuna in Delhi, seventy percent of the pollution in the river is from untreated sewage while the remaining thirty percent is from industrial sources, agricultural run-off and domestic garbage.

Prakash Singh/AFP

Religious offerings from devotees and leftover wooden frames of Lord Ganesh idols pile up in the Yamuna river in New Delhi, India, on Friday. Considered one of the holiest rivers in India, the Yamuna River has been dying a slow death from pollution for decades despite the investment of millions of dollars to preserve its ecosystem

An elderly economically backward villager listens to a speaker, unseen, during a rally demanding pension for elderly poor citizens in New Delhi, India, Thursday, Aug. 22, 2013.

Altaf Qadri/AP

An elderly woman listens to a speaker, unseen, during a rally demanding pensions for elderly poor citizens in New Delhi, India.

An Indian woman adjusts her sari after she got wet in the monsoon rains in New Delhi, India, Wednesday, Aug. 7, 2013. India's monsoon season, which runs from June through September, brings rains that are vital to agriculture. (AP Photo/Altaf Qadri)

Altaf Qadri/AP

An Indian woman adjusts her sari after getting wet in the monsoon rains in New Delhi, India on Wednesday. India’s monsoon season, which runs from June to September, brings rains that are vital to agriculture. Read more

Indian school children return home in a cycle rickshaw in New Delhi, India , Wednesday, July 24, 2013. India's Right To Education Act promises free, compulsory schooling to all children ages 6 to 14, but millions of children still don't go to school and many who do are getting only the barest of educations. (AP Photo/Tsering Topyal)

Tsering Topyal/AP

Children return home from school in a cycle rickshaw in New Delhi, India, on Wednesday. The country’s Right to Education Act promises free, compulsory schooling for all children aged six to 14, but millions still do not go to school and many who do are getting only the barest of educations.

Indians huddle together under an umbrella as they cross a road during heavy downpour in New Delhi, India, Tuesday, July 16, 2013.

Altaf Qadri/AP

People huddle together under a large umbrella as they try to shelter themselves against a heavy downpour in New Delhi, India, on Tuesday

Insects and birds fly in a dump yard as a rag picker collects scraps in New Delh

Anindito Mukherjee/Reuters

Insects and birds fly in a dump yard as a rag picker collects scraps in New Delhi on Thursday.

A child displaced by the rising waters of the river Yamuna sits on a cycle cart parked outside makeshift tents at a roadside camp in New Delhi June 20, 2013. India's monsoon rains could ease soon after hitting 89 percent over averages in the week to June 19, according to weather office sources, in a third straight week of downpours that have caused major flooding in north India. REUTERS/Ahmad Masood (INDIA - Tags: ENVIRONMENT DISASTER)

Ahmad Masood/Reuters

A child displaced by the rising waters of the river Yamuna sits on a cycle cart parked outside makeshift tents at a roadside camp in New Delhi, India on Thursday.