technologically advanced facets of Art Deco, and architects began the process of transformation by the early 1930s. Mumbai's expanding port commerce in the 1930s resulted in the growth of educated middle class population. It also saw an increase of people migrating to Mumbai in search of job opportunities. This led to the pressing need for new developments through Land Reclamation Schemes and construction of new public and residential buildings. Parallelly, the changing political climate in the country and the aspirational quality of the Art Deco aesthetics led to a whole-hearted acceptance of the building style in the city's development. Most of the buildings from this period can be seen spread throughout the city neighbourhoods in areas such as Churchgate, Colaba, Fort, Mohammed Ali Road, Cumbala Hill, Dadar, Matunga, Bandra and Chembur. South America Art Deco in South America is especially present in countries which received a great wave of immigration in the first half of the 20th century, with notable works in their richest cities, like São Paulo and Rio de Janeiro in Brazil and Buenos Aires in Argentina. The Kavanagh Building in Buenos Aires (1934), by Sánchez, Lagos and de la Torre, was the tallest reinforced-concrete structure when it was completed, and is a notable example of late Art Deco style. Preservation and Neo Art Deco In many cities, efforts have been made to protect the remaining Art Deco buildings. In many U.S. cities, historic art deco cinemas have been preserved and turned into cultural centres. Even more modest art deco buildings have been preserved as part of America's architectural heritage; an art deco café and gas station along Route 66 in Shamrock, Texas is an historic monument. The Miami Beach Architectural District protects several hundred old buildings, and requires that new buildings comply with the style. In Havana, Cuba, many Art Deco buildings have badly deteriorated. Efforts are underway to bring the buildings back to their original appearance. In the 21st century, modern variants of Art Deco, called Neo Art Deco (or Neo-Art Deco), have appeared in some American cities, inspired by the classic Art Deco buildings of the 1920s and 1930s. Examples include the NBC Tower in Chicago, inspired by 30 Rockefeller Plaza in New York City; and Smith Center for the Performing Arts in Las Vegas, Nevada, which includes art deco features from Hoover Dam, 80 km (50 miles) away. Gallery See also Art Deco in