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World Energy Outlook 2007

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In the past two-and-a-half decades, global emissions rose more slowly than<br />

primary energy demand, mainly because the shares of carbon-neutral nuclear<br />

power and natural gas – the least carbon-intensive fossil fuel – expanded. In<br />

addition, the share of renewables in the energy mix increased. Emissions grew<br />

by 1.61% per year, while energy use rose by 1.85%. This trend is projected to<br />

reverse in the Reference and High Growth Scenarios, as the share of nuclear<br />

power declines while that of coal rises. By contrast, in the Alternative Policy<br />

Scenario, the carbon intensity of energy use falls (Figure 5.4). Average carbondioxide<br />

content per toe of energy is projected to rise from 2.33 tonnes in 2005<br />

to 2.36 tonnes in 2030 in the Reference Scenario and 2.39 in the High Growth<br />

Scenario. It declines to 2.15 in the Alternative Policy Scenario. Non-OECD<br />

regions in aggregate account for all of the increase in carbon intensity in every<br />

scenario: rapid growth in renewables reduces intensity in the OECD in all<br />

three scenarios.<br />

2.5%<br />

Figure 5.4: Average Annual Growth in <strong>World</strong> <strong>Energy</strong>-Related CO 2<br />

Emissions and Primary <strong>Energy</strong> Demand by Scenario<br />

2.0%<br />

1.5%<br />

1.85%<br />

1.61%<br />

1.83%<br />

1.77%<br />

1.30%<br />

2.11%<br />

2.00%<br />

1.0%<br />

0.97%<br />

0.5%<br />

0%<br />

1980-2005<br />

Reference<br />

Scenario<br />

2005-2030<br />

Alternative<br />

Policy<br />

Scenario<br />

High<br />

Growth<br />

Scenario<br />

<strong>Energy</strong> demand<br />

CO 2<br />

emissions<br />

Power generation contributes around half the increase in global emissions<br />

from 2005 to 2030 in the Reference Scenario. This share is significantly<br />

lower in the Alternative Policy Scenario, at 38%, and a fraction higher in the<br />

High Growth Scenario. The share of the power sector in total emissions<br />

194 <strong>World</strong> <strong>Energy</strong> <strong>Outlook</strong> <strong>2007</strong> - GLOBAL ENERGY PROSPECTS: IMPACT OF DEVELOPMENTS IN CHINA & INDIA

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