The city-state of Singapore is nestled on an island just south of a strip of land in northeastern Malaysia (Kuala Lumpur is situated north of Singapore).
They don't have much farmland there as most of the island is covered by the city. So Singapore has imported almost all of its food for generations.
But this article rounds up various projects the city and local entrepreneurs have embarked upon to grow up to 30% of the city's food right there on the island.
How do we produce more food with less arable land? Singapore gives a glimpse into the future of food
They build rooftop farms for vegetables and chickens, and have self-contained fish farms just off the coast of the island. The technologies are quite innovative and green compared to farming elsewhere in the world. Singapore will probably serve as a model for sustainable food systems for generations to come.