deep-water port connected to the San Francisco Bay by a channel through the Sacramento–San Joaquin River Delta. It is the shipping and rail center for the Sacramento Valley. Trees Sacramento has long been known as the "City of Trees" owing to its abundant urban forest. The city has more trees per capita than anywhere else in the world. The first recorded use of the term was in 1855, and it was popular by the early 20th century. It was not always so: it was at first called the “City of Plains” because of the lack of trees, but soon afterward there were cottonwood trees planted, and eucalyptus varieties were imported to dry out swampland. Later, locust trees, and willows were planted along streets, then elms, then palm trees, then fruit trees in the late 1910s. It was the first US city to be designated a City of Trees by the Arbor Day Foundation in 1978. In the early 21st century, the tree cover is well above that of the average tree cover of other major cities in the United States and the rest of the world, with the main species being the London plane. Other species are being introduced to increase diversity and to help cope with the effects of climate change on vegetation in the future. Treepedia, a project run by MIT using Google Maps’ street-view data to calculate tree coverage in cities, ranked Sacramento the greenest city of 15 studied in the US, and third globally, after Vancouver and Singapore. A prominent water tower bore the slogan "City of Trees" until 2017 when it was repainted with the words "America’s Farm-to-Fork Capital" (referring to the farm-to-fork movement, which promotes the consumption of locally-grown food). After 4,000 displeased citizens signed a petition protesting the change, officials agreed to include both slogans on the water tower. Cityscape City neighborhoods The city groups most of its neighborhoods into four areas: Area One: Alkali Flat, Boulevard Park, Campus Commons, Sacramento State, Dos Rios Triangle, Downtown, East Sacramento, Fab Forties, Mansion Flats, Marshall School, Midtown, New Era Park, McKinley Village, Newton Booth, Old Sacramento, Poverty Ridge, Richards, Richmond Grove, River Park, Elmhurst, Sierra Oaks, Southside Park. Area Two: Airport, Carleton Tract, Freeport Manor, Golf Course Terrace, Greenhaven, Curtis Park, Hollywood Park, Land Park, Little Pocket, Mangan Park, Meadowview, Parkway, Pocket, Sacramento City College, South Land Park, Valley Hi / North Laguna, Z'Berg Park.