All the things which cannot be recycled?

wood

very few things cannot be recycled. Wood can be and is many times. Old lumber can be reused as decoration, turned into furniture, ground up and used for particle board or mulch, burned for fuel and the charcoal can be used after that. The only things that cannot be recycled in some manner are things that cease to exist after the first use. Things that are burned are usually gone for good. Even food that is eaten could be used as fertilizer and is in some parts of the world.