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A man rides his bicycle on Habib Bourguiba Avenue in Tunis, Tunisia, on Dec. 9, 2018. A car-free day was organized by Tunisian municipality on Habib Bourguiba Avenue on Sunday to advocate green commuting. (Xinhua)
A man rides his bicycle on Habib Bourguiba Avenue in Tunis, Tunisia, on Dec. 9, 2018. A car-free day was organized by Tunisian municipality on Habib Bourguiba Avenue on Sunday to advocate green commuting. (Xinhua)