They correspond to all the remains that have animal or vegetable origin. All this waste – except animal remains – can be recovered and converted into compost or energy through different strategies, such as composting, vermiculture or biodigestion.

Source: Basura Foundation (online course HOW TO LIVE ZERO GARBAGE)

Examples, tips and links of interest:

Remains of fruits, vegetables, eggshells, pruning remains, plants, branches, wooden sticks, tea, coffee grounds, among others.