Consumption of Non-Renewable Resources

                               AT PRESENT RATES        EXPONENTIAL GROWTH

Decade Beginning

Incremental Supply Expended (Years)

Cumulative Supply Expended (Years)

Incremental Supply Expended (Years)

Cumulative Supply Expended (Years)

2000

10

10

10

10

2010

10

20

20

30

2020

10

30

40

70

2030

10

40

80

150

2040

10

50

160

310

2050

10

60

320

630

2060

10

70

640

1,270

2070

10

80

1,280

2,550

2080

10

90

2,560

5,110

2090

10

100

5,120

10,230

2100

10

110

10,240

20,470

2110

10

120

20,480

40,950

2120

10

130

40,960

81,910

2130

10

140

81,920

163,830

2140

10

150

163,840

327,670

2150

10

160

327,680

655,350

2160

10

170

655,360

1,310,710

2170

10

180

1,310,720

2,621,430

2180

10

190

2,621,440

5,242,870

2190

10

200

5,242,880

10,485,750