. 2015 Sep 28;112(41):12723–12728. doi: 10.1073/pnas.1512542112

Table S1.

Major forces driving LULC change in association with IPCC SRES scenarios and population growth

Driving force	IPCC SRES scenarios (6) for United States until 2050
Driving force	A1B	A2	B1
Population growth (global and United States) (27)	Medium. Globally, 8.7 billion by 2050, then declining; in the United States, 385 million by 2050	High. Globally, 15.1 billion by 2100; in the United States, 417 million by 2050	Medium. Globally, 8.7 billion by 2050, then declining; in the United States, 385 million by 2050
Economic growth	Very high. US per-capita income $72,531 by 2050	Medium. US per-capita income $47,766 by 2050	High. US per-capita income $59,880 by 2050
Regional or global orientation	Global	Regional	Global
Technological innovation	Rapid	Slow	Rapid
Energy sector	Balanced use	Adaptation to local resources	Smooth transition to renewable
Environmental protection	Active management	Local and regional focus	Protection of biodiversity

Note: The IPCC SRES scenarios were used in this study because the new IPCC “Representative Concentration Pathways” (RCPs) were not available at that time when our study had been already conducted for more than 3 y.