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Elderly Indians participate in celebrations to mark International Day of Older Persons at an old age home in Ahmadabad, India, Tuesday, Oct. 1, 2013. Much of the world is not prepared to support the ballooning population of elderly people, including many of the fastest-aging countries, according to a global study scheduled to be released Tuesday, Oct. 1, by the United Nations and an elder rights group.

Ajit Solanki/AP

Elderly Indians take part in celebrations to mark the International Day of Older Persons at a home in Ahmadabad, India, on Tuesday. Much of the world is unprepared for the ballooning population of elderly people, including many of the fastest-aging countries, according to a global study to be released by the UN and a rights group for the elderly.

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.