The present invention provides a new method for decomposing andor removing hazardous substances using a photocatalytic material. Users begin by entering their current measurements, measurement goals and current picture into the system, preferably via a Web site. In a second aspect, the detection means comprises a first unit having a first photodetector array ; and a second unit, having a second photodetector array, offset with respect to the first unit. Dynamic content having a bit-depth greater than the bit-depth of the content display unit is parsed into sub-pixels for display on the content display unit.