ISBN-13: 9781481849210 / Angielski / Miękka / 2012 / 42 str.
ISBN-13: 9781481849210 / Angielski / Miękka / 2012 / 42 str.
Over the past few years, the Chinese government has implemented a number of policies to tighten its control over the production and export of "rare earths"-a unique group of 17 metal elements on the periodic table that exhibit a range of special properties, such as magnetism, luminescence, and strength. Rare earths are important to a number of high technology industries, including renewable energy and various defense systems.