Bloomberg Businessweek’s special “Elements” issue is themed around the 150th anniversary of Dmitri Mendeleev’s periodic table—using it as a lens through which to examine supply chain vulnerabilities, national security, climate change, and the physical limits of the digital age. Stories feature Apple, Boeing, De Beers, Green Science Policy Institute, Greenland Minerals Ltd., Helium One, Jacobsen Salt Co., Lawrence Berkeley National Laboratory, and many more.