InsideClimate: John Geissman heads the department of geosciences at the University of Texas at Dallas, responsible for the education of the next generation of geoscientists. He is also a member of the development board of the American Geophysical Union (AGU), a perch from where he works to raise money for the organization. He has included a substantial bequest for the AGU in his will, as well. Among geoscientists in Texas, however, Geissman is an outlier. He believes the world must keep fossil fuels in the ground...