Many factors have led to global interdependence in both politics and business. Perhaps the greatest factor is trade. First, many natural resources are unevenly distributed across the globe, with the middle east having the most easily recoverable petroleum resources, China over half the world's active mines for rare earths (minerals like loparite, bastnasite, and monazite), and Africa the major source for diamonds. With increasingly complex technology requiring many different resources, interdependence in unavoidable. Next, as communications and transportation technology have become more efficient, it has become easier for corporations to create global manufacturing and supply chains. This economic interdependence leads to political interdependence and harmony, as governments need to talk with major trading partners.