In many western countries heavy industry is high developed. The difference between heavy and light industry are based on the nature of the goods produced. Heavy industry produce machines while light industry uses machines produce the smaller objects required for various purpose in our home and offices. The growth of industry in country depends on the general level of economic or industrial development. In its beginning, industrialization is likely to be cheap. To decrease （减少）costs, industrialists in an area usually depend to local supplies of the coal or electric power for their operation.