Fortune's third annual 'World's 50 Greatest Leaders' list features men and women from across the globe from the fields of business, government, philanthropy and the arts who are "transforming the world and inspiring others to do the same."

47-year-old Aam Aadmi Party chief is ranked 42nd on the list and is the sole leader from India.

However, South Carolina's Indian-American Governor Nikki Haley is also on the list at 17th while another Indian-American Resham Saujani is at the 20th spot.

Fortune credits Kejriwal for his efforts to curb pollution in New Delhi through the scheme of allowing vehicles of odd and even numbers on alternate days on the city's roads.

"When Kejriwal unveiled a blueprint to tackle the smog in New Delhi –  called the world's most polluted city by the World Health Organization –  many were sceptical. A key component: an 'odd-even' pilot project in which vehicles were allowed on the roads only on alternate days.

It said leadership is not "demagoguery, pandering, even populism" but is defined by people across the world "you've never heard of who are rallying followers to make life better in ways you never imagined."

"The leaders you'll meet here, known and new, will lift your mood and upgrade your assessment of the world's future. Some may inspire you to join their followers. And those unheard-ofs, so seemingly ordinary, may even prompt you to rethink your own potential as an inspiring leader," Fortune said.

Bezos, who topped the list this year, has been on the list all three times, along with Pope Francis who comes in at the 4th position followed by Apple CEO Tim Cook.

The list includes German Chancellor Angela Merkel (2), Myanmar's pro-democracy leader Aung San Suu Kyi at (3), US astronaut Scott Kelly and Russian cosmonaut Mikhail Kornienko (22), IMF Managing Director Christine Lagarde (36), Bill & Melinda Gates Foundation Co-chair and CEO Melinda Gates and Susan Desmond-Hellmann (41), Canadian Prime Minister Justin Trudeau (48) and Bhutanese Prime Minister Tshering Tobgay (50).

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