Installing ceramic or porcelain tile is both an art and a science. Tile installers must know the composition of the tiles as well as how to lay them in place attractively. Besides the normal costs of labor and materials, a tile project's costs vary by the type of sub-flooring to be used as a foundation for the tile.
Three things can cause an EMI problem: A signal source creates some kind of noise, there is a transmission path for the noise, and/or there is a receiver sensitive enough to be distorted by the noise, as shown in Figure 1.
Of the lesser causes of pollution, noise pollution is caused by loud noises, such as loud music and industrial machinery. Radioactive pollution comes from improperly handled radioactive material. Heat pollution comes from industry and air pollution raising an area's temperature higher than it should be.