What is claimed is:
1. An adhesive system comprising:
(a) a resin comprising at least about 30% by weight of a phenol-formaldehyde resin and at least about 30% by weight of a derivative of native lignin; and(b) an isocyanate-based binder.
This application is a divisional application of U.S. application Ser. No. 14/798,396, filed Jul. 13, 2015; which is a continuation of U.S. application Ser. No. 13/584,651, filed Aug. 13, 2012; which is a continuation of PCT/CA2011/000182, filed Feb. 15, 2011; which claims the priority of U.S. Provisional Application No. 61/304,745,...