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Archive | REF: BE8517 V1

Grey energy

Author: Christian NGÔ

Publication date: August 10, 2017

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7. Lifecycle analysis

As we emphasized above, the notion of life cycle, sometimes referred to as "cradle-to-grave" or, in the transport sector, "well-to-wheel", is an essential methodology for assessing the energy balance of a product or service.

To illustrate the different stages to be taken into account in life cycle assessment, let's take the example of a T-shirt manufactured in Asia and used in a European country. The various stages to be considered are shown in figure 3 .

  • The first stage is the cultivation of cotton (four species are grown), which requires a lot of water, fertilizers, pesticides and defoliants. Around a quarter of the pesticides used worldwide are dedicated to...

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