3.2. Energy consumption and carbon emissions characteristics in different urbanization stages
Energy consumption and carbon emissions trends emerged when Regorafenib data was divided into four urbanization development stages, 1985–1993 (S1), 1993–2000 (S2), 2000–2005 (S3), and 2005–2009 (S4) (as shown in Table 3). Before 1993, urbanization development was slow and prolonged, and the urbanization level was less than 30%. This can be understood as the beginning stages of urbanization. From 1993 to 2009 the annual urbanization rate, energy consumption, and carbon emissions rose 1.1%, 9.5%, and 9.6%, respectively in the three stages. During this period, average annual energy consumption and carbon emissions increased by 14.57 million tce and 10.33 million tons, for every 1% increase in the urbanization rate. The increase in energy use and carbon emissions were not significant in S1, but were in S2 through S4. Once the urbanization rate exceeded 38% by 2000, energy consumption and carbon emissions significantly increased.