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</html><description>Metals are a commonly used substance which has properties that allow different applications that range from accessories to construction. Though there are many different types of metals, there are certain metals that have more use than others such as aluminum Continue reading &rarr;</description><thumbnail_url>http://sites.sandiego.edu/sdpollutiontrackers/files/2018/05/Heavy-Metals-300x249.jpg</thumbnail_url></oembed>
