The vast majority of monomers used to make plastics are derived from fossil hydrocarbons. Furthermore, most of the commonly used plastics are not biodegradable. As a result, they accumulate in landfills or the natural environment. This has resulted in a societal concern over overcrowding of landfills, climate change, and rapid depletion of natural resources. The use of sustainable cellulosic biomass for wood plastic composites (WPCs) and recycling of plastics for WPC applications provide significant ecological benefits.