Arizona's economy is a varied one. Agriculture, ranching, lumbering, and mining have traditionally been important, and they are still significant to the economy, but their relative importance is declining. Today manufacturing is the most important industry in Arizona, and it far outstrips other sectors of the economy in significance. Most of the manufacturing is in electronics, so it is non-polluting, high paying, and very desirable. Tourism is also important in the Arizona economy, because Arizona has many natural wonders that attract visitors from around the world. There is rapid growth and the state's economy is expanding, and therefore the construction industry is also dynamic and growing. Arizona thus has a viable and dynamic economy, an economy that is slowly changing and evolving to fit the needs of the latter half of the twentieth century.