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Counting all impacts generated within economy, ignoring impacts from imports

Figure 7.7. Two consistent ways of treating imports and exports in LCA (Kuemmel et al, 1997).

Counting all impacts generated within economy, ignoring impacts from imports

Figure 7.7. Two consistent ways of treating imports and exports in LCA (Kuemmel et al, 1997).

The two types of analysis are illustrated in Fig. 7.7. The method in common use for product LCA, where imbedded impacts are traced through the economies of different countries, not only seems problematic when used in any practical example but is also unsuited for the system analysis that decision-makers demand. In contrast, one may use a conventional economic ap proach, where import and export are specific features of a given economy, deliberately chosen in consideration of the assets of the country, and calculate LCA impacts only for the economy in question, in order to be consistent.

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Renewable Energy 101

Renewable Energy 101

Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable. The usage of renewable energy sources is very important when considering the sustainability of the existing energy usage of the world. While there is currently an abundance of non-renewable energy sources, such as nuclear fuels, these energy sources are depleting. In addition to being a non-renewable supply, the non-renewable energy sources release emissions into the air, which has an adverse effect on the environment.

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