agricultural fertilizers

refuse derived fuels, industrial mineral oils and mineral greases, lubricants for machines and vehicles, all of these products being obtained from organic and non-organic refuse

metallic building materials; namely, beams, columns coverings, roofs, walls, scaffolding, doors, roller blinds; transportable metal buildings; metallic pipes; metallic silos

machines; namely, presses, separators, mills, particle sorters and pelletizers; pneumatic conveyors; motors for machines; power operated shears

mechanical and electronic weighing scales, meters and densimeters

boilers, ventilation hoods, heat exchangers, incinerators, ovens and furnaces for use in waste management; filters, air purifiers and electric fans for purification of air recirculated in refuse treatment plants and in plants to produce gas for fuel; heating units to produce gas for fuel

cardboard and construction paper, corrugated paper, crepe paper, gift wrapping paper, grocery paper, gummed paper, newsprint, note paper, packing paper, printing paper, reproduction paper, safety paper, typewriter paper, paper bags and envelopes, recycled from urban wastes

plastic tubes to convey liquids and dusts and to hold electric wires and cables

non-metallic silos, windows, and stacks or chimneys

live flowers and living plants

construction and maintenance of specially equipped areas for the disposal, treatment and recycling of waste, including the construction of plants for incineration, burning, gasification of fuels, sound-proofing, production of energy, ventilation and dumping of wastes

transport and storage of waste

treatment of wastes and waste waters

consulting services in the class of waste treatment plants