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What percentage (%) of the worlds greenhouse gas GHGS emissions is energy accountable for *? 

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It is concluded that the UK's Kyoto target of a 12.5% reduction in greenhouse gas emissions is not challenging.
But the upshot is that the average American is responsible, through his/her greenhouse gas emissions, for the suffering and/or deaths of one or two future people.
The magnitude is uncertain, but plausibly 10 percent reductions in greenhouse gas emissions from 2005 levels could be achieved at moderate costs by 2020.
While this is a significant component, the CH4 associated with imported embodied energy should also be included in national greenhouse gas (GHG) inventories.
It is argued that greenhouse gas emissions should be included in environmental impact assessments.
The results show that for greenhouse gas emissions, the accuracy of emission inventory varies in different sectors.
We then show that estimates for such sector-specific greenhouse gas emissions are often required for various types of corporate as well as public policy analyses in both domestic and international contexts.

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