There were many changes between SimCity 3000 and its immediate predecessor SimCity 2000 (SC2K). These changes spanned both the integral city management aspects of the game, as well as its graphical and landscape aspects. These changes gave the game a feel greatly different from that of SC2K.rnIn a pattern which has continued throughout the SimCity franchise, the number and complexity of city services increased between SC2K and SC3K, and the graphics quality was greatly improved as well. The most notable change was the addition of the concept of waste management. In SC3K, once a city has a population greater than 1,000, garbage begins to accumulate, and must be disposed of at the expense of the city. Farms and agricultural structures were also introduced, appearing on large light industrial zones in a city with low land value and little pollution. A new zoning density was also added, totalling three densities, compared to SC2K's two. In addition to their limited life span, power plants were also made vulnerable to decreasing maximum output due to age.