Energy sprawl or energy efficiency: climate policy impacts on natural habitat for the United States of America.
Concern over climate change has led the U.S. to consider a cap-and-trade system to regulate emissions. Here we illustrate the land-use impact to U.S. habitat types of new energy development resulting from different U.S. energy policies. We estimated the total new land area needed by 2030 to produce energy, under current law and under various cap-and-trade policies, and then partitioned the area impacted among habitat types with geospatial data on the feasibility of production. The land-use intensity of different energy production techniques varies over three orders of magnitude, from 1.9-2.8 km(2)/TW hr/yr for nuclear power to 788-1000 km(2)/TW hr/yr for biodiesel from soy. In all scenarios, temperate deciduous forests and temperate grasslands will be most impacted by future energy development, although the magnitude of impact by wind, biomass, and coal to different habitat types is policy-specific. Regardless of the existence or structure of a cap-and-trade bill, at least 206,000 km(2) will be impacted without substantial increases in energy efficiency, which saves at least 7.6 km(2) per TW hr of electricity conserved annually and 27.5 km(2) per TW hr of liquid fuels conserved annually. Climate policy that reduces carbon dioxide emissions may increase the areal impact of energy, although the magnitude of this potential side effect may be substantially mitigated by increases in energy efficiency. The possibility of widespread energy sprawl increases the need for energy conservation, appropriate siting, sustainable production practices, and compensatory mitigation offsets.
McDonald
Robert I
RI
Worldwide Office, The Nature Conservancy, Arlington, Virginia, USA. rob_mcdonald@TNC.ORG
Fargione
Joseph
J
Kiesecker
Joe
J
Miller
William M
WM
Powell
Jimmie
J
D002980:Climate; D003246:Conservation of Energy Resources; D017753:Ecosystem; D004777:Environment; D014481:United States
Science. 2008 Feb 29;319(5867):1238-40
18258860
Environ Monit Assess. 2005 May;104(1-3):19-35
15931975
Conserv Biol. 2008 Jun;22(3):602-9
18261147
Proc Natl Acad Sci U S A. 2006 Jul 25;103(30):11206-10
16837571
Environ Sci Technol. 2008 Aug 1;42(15):5791-4
18754510
Science. 2008 Feb 29;319(5867):1235-8
18258862
Nature. 2007 Nov 22;450(7169):478
18033274
Biol Rev Camb Philos Soc. 2006 May;81(2):163-82
16336747
Science. 2009 May 29;324(5931):1183-6
19478180
Nature. 2004 Jan 8;427(6970):145-8
14712274
Izv Akad Nauk Ser Biol. 2006 Mar-Apr;(2):248-51
16634445