Photogravure printing; production of energy; air purification; air freshening; fuel processing; Generation of electricity from solar energy; Generation of power; Generation of electricity from wind energy; Magnetization; metal treating; Metalworking; Fuel refining; metal casting; Heat treatment of metals; pattern printing; printing; Providing information relating to material treatment; Photogravure; Design printing for others; Upcycling in the nature of waste recycling; decontamination of haz...