The UN SDSN Leadership Council is led by the director of the Earth Institute at what university?
Jeffrey Sachs Jeffrey David Sachs ( ; born November 5, 1954) is an American economist and director of the Earth Institute at Columbia University, where he holds the title of University Professor, the highest rank Columbia bestows on its faculty. He is known as one of the world's leading experts on economic development and the fight against poverty.
G. Michael Purdy Graham Michael "Mike" Purdy is a British geophysicist and oceanographer who specializes in marine seismology. He is the current Executive Vice President for Research at Columbia University. Previously, he was the Director of Columbia's Lamont-Doherty Earth Observatory (LDEO).