Buonocore and co-workers calculate how much energy is needed to extract energy from forests in Italy. A common way of measuring this is the Energy Return on Investment (EROI), the ratio between the energy extracted and the energy invested in the process. In order to generate wood chips an EROI of 22 is calculated, much higher than that for biodiesel (1.3) but lower than for hydropower (100). Read the whole article in Ecological Modelling.
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