== Uddybende kriterier ==
[[CO2-neutralt brændstof|CO<sub>2</sub>-neutralt brændstof]] er dannet eller [[producere]]t på en sådan måde, at der samlet under fremstillingen er blevet optaget ligeså meget CO<sub>2</sub> fra [[luft]]en<ref>[http://www.sciencedaily.com/releases/2012/01/120104115100.htm American Chemical Society (2012, January 5). New materials remove carbon dioxide from smokestacks, tailpipes and even the air. ScienceDaily] Citat: "...the group turned to solid materials based on polyethylenimine, a readily available and inexpensive polymeric material...After capturing carbon dioxide, the materials give it up easily so that the CO2 can be used in making other substances, or permanently isolated from the environment. The capture material then can be recycled and reused many times over without losing efficiency...."</ref>, som der frigives under brændslets og brændstoffets levetid.
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