In 2166 a large-scale botanical garden was built in the city of Vancouver on an artificial island that was built off the coast of the city. This was the largest Botanical Gardens in North America and rivaled the botanical gardens in Singapore airport. This botanical Gardens exhibited plants and animals from all over the world. However, it also produced biofuel for the entire North American section of the Singaporean Empire. These botanical Gardens were expanded in the 25th century when a series of artificial islands were built to provide housing for the people of Vancouver who could no longer afford to live in a large mega-city with 25 million people.