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"Renewable energy projects create electricity without pollution. This, and other incremental values of renewable energy generation, compared to generation from conventional sources such as fossil fuel and nuclear, are often recognized and quantified as the environmental attributes, “Green Tags”, “Renewable Energy Credits” (RECs), or “Tradable Renewable Certificates” (TRCs). These are defined and sold separately from energy" From the second reference.

Det avhenger av sammenhengen ordet brukes i. Miljøegenskaper passer kanskje inn i de fleste sammenhenger. Hvis ikke, kan ordet miljøpåvirkninger eller (i dette tilfellet) miljøgevinst(er) fungere som en fri oversettelse.


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Note added at 20 hrs (2010-08-07 08:21:45 GMT)
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Som nevt har sammenhengen mye å bety for oversettelsen, men "environmental attributes", direkte oversatt til norsk, betyr "miljøegenskaper".

Q9. What are the environmental attributes of an environmentally preferable product?
Environmental attributes are either positive or negative and can include:

Positive Attributes: recycled content, product disassembly potential; durability; reusability; reconditioned or remanufactured; bio-based; energy and water efficiency; and, resource efficiency (non-renewable and renewable).

Negative Attributes: emissions of greenhouse gases, bio-accumulative pollutants, ozone-depleting substances, volatile organic compounds and particular matter, pollutants released to water; and, hazardous and non-hazardous solid waste.

http://www.tpsgc-pwgsc.gc.ca/ecologisation-greening/achats-p...