The Turkish city of Izmir is bidding to host the 2020 World Expo, its mayor, Aziz Kocaoglu, said yesterday.

The city, which is displaying its sewage treatment system at the Urban Best Practices Area, is going with the theme of "Healthy Life."

"We're confident we can hold a successful Expo as Shanghai has," Kocaoglu said. He said the theme expressed the city's wish for people from different countries and regions to get along peacefully.

Other bidders include Sao Paulo and Thailand.