sustainability - SUNY College of Environmental Science and Forestry

Sustainability 2011 , 3
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Table. Cont.

World GDP PPP, Energy and Energy intensity

Date World Quad

btu TPES

GDP PPP Billion

2000$

Intensity Kbtu/$

PPP

Intensity kWh/$

PPP

1998 401,860 42,085 9.55 2.80

1999 409,775 43,674 9.38 2.75

2000 418,625 45,761 9.15 2.68

2001 420,069 46,940 8.95 2.62

2002 429,289 48,349 8.88 2.60

2003 444,602 50,267 8.84 2.59

2004 465,820 52,884 8.81 2.58

2005 477,336 55,438 8.61 2.52

2006 489,893 58,466 8.38 2.46

2007 502,920 61,748 8.14 2.39

2008 512,286 63,866 8.02 2.35

To characterize the world economic energy intensity it is helpful to show the raw data and ratios for
world GDP (PPP) and TPES purchased energy use from the IEA [36]. Similar world data is available
from the US EIA[27] from 1980, showing the same average decay rate of energy intensity over time of
1.3%/yr.

Figure A1. World Economic Intensity, kWh/$ PPP (blue) with Exponential Fit (yellow):

Decay rate trend (~1.3%/yr) (Table 4 in [29]).

G