The health of a big, developed country’s depends largely on its industry. Factories have to keep busy. They must and sell their in large quantities. must make and sell ships; car must make and sell cars. A period of industrial success, when everything goes well and large profits are made, is called a (an) . On the other hand a period when there is not much industrial activity is called a . To maintain a high level of production is not simple. For example Japan, a very successful industrialized country, has very few natural such as oil or coal, and has to them from other countries in order to keep its industries going, and thus to supply needs at home and also to its goods to its overseas .