Editing IPCC:AR6/SR15/Chapter-4 (section)

==== 4.3.4.3 Bio-based feedstocks ====

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Bio-based feedstock processes could be seen as part of the circular materials economy (see section above). In several sectors, bio-based feedstocks would leave the production process of materials relatively untouched, and a switch would not affect the product quality, making the option more attractive. However, energy requirements for processing bio-based feedstocks are often high, costs are also still higher, and the emissions over the full life cycle, both upstream and downstream, could be significant (Wesseling et al., 2017) <sup>[[#fn:r434|434]]</sup> . Bio-based feedstocks may put pressure on natural resources by increasing land demand by biodiversity impacts beyond bioenergy demand for electricity, transport and buildings (Slade et al., 2014) <sup>[[#fn:r435|435]]</sup> , and, partly as a result, face barriers in public acceptance (Sleenhoff et al., 2015) <sup>[[#fn:r436|436]]</sup> .

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