Original sentence: A variety of factors during this period allowed for the explosive growth of suburbs and depopulation of cities, including the creation of Interstate highways and suburban parkways, both of which greatly reduced the travel time between suburbs and downtowns, and devalued cities by demolishing existing neighborhoods in their path, the post-war economic boom, and racism.Some parts of the New York metropolitan area with emerging Hispanic populations are actually experiencing a new phenomenon where "white flight" neighborhoods that became mostly black in population are now experiencing a "black flight" by blacks as Hispanics move in.Sundown help
Edited sentence: A variety of factors during this period allowed for the explosive growth of suburbs and depopulation of cities, including the creation of Interstate highways and suburban parkways, both of which greatly reduced the travel time between suburbs and downtowns, and devalued cities by demolishing existing neighborhoods in their path, the post-war economic boom, crime, mass immigration and racism.List of race riots.Race and crime.Some parts of the New York and Los Angeles metropolitan areas with emerging Hispanic populations are actually experiencing a new phenomenon where "white flight" neighborhoods that became mostly black in population are now experiencing a black flight by blacks as Hispanics move in.Urban sprawl