But things like forest residue, algae and switchgrass are also used.
但也使用了森林残留物、藻类和柳枝稷等物质。
英语百科
Green waste
(重定向自Forest residue)
Green waste is biodegradable waste that can be composed of garden or park waste, such as grass or flower cuttings and hedge trimmings, as well as domestic and commercial food waste. The differentiation green identifies it as high in nitrogen, as opposed to brown waste, which is primarily carbonaceous.