Page 25 - Advances in Eco-Fuels for a Sustainable Environment

2 Advances in Eco-Fuels for a Sustainable Environment

850 World total energy consumption Projections 10.0
History
World total energy consumption (quadrillion Btu) 700 Growth rate 8.5 World total polulation (Billion)
800
9.5
750
World total population
9.0
650
8.0
600
550
1.52 per year
7.5
500
7.0
450
6.5
Growth rate
400
350
5.5
300
250 1.182 per year 6.0
5.0
1990 1995 2000 2005 2010 2015 2020 2025 2030 2035 2040
Year
Fig. 1.1 World total energy consumption and total population growth.
(Based on International Energy Outlook IEO, International Energy Outlook 2016, Chapter 1:
World energy demand and economic outlook, [cited on 10 November 2016]; Available from:
<https://www.eia.gov/forecasts/ieo/world.cfm> 2016; The World Bank, Total population data,
[cited on 20th November, 2016]; Available from: <http://data.worldbank.org/indicator/SP.
POP.TOTL?end¼2015&start¼1960&view¼chart>, 2016.)

280
Liquid Fuel History Projections
260
Coal
Total energy consumption (quadrillion Btu) 180
Natural Gas
240
Renewable
220
Nuclear
200
160
140
120
100
80
60
40
20
0
1990 1995 2000 2005 2010 2015 2020 2025 2030 2035 2040
Year

Fig. 1.2 World total energy consumption by energy sources [1].