Can theologians respond meaningfully to the overwhelming scientific evidence that human activities are accelerating the temperature of Earth and adversely affecting people, other species, ecological systems, and the biosphere? Members of the Catholic Theological Society of Americas Interest Group on Global Warming have dug deeply into the biblical to contemporary traditions, reflected systematically, and produced seventeen original essays that demonstrate fruitful ways in which to approach the climate crisis so that current and predicted effects may be mitigated. Framing these essays are an overview of basic scientific findings that compelled this group effort and statements by the United States Conference of Catholic Bishops and Pope Benedict XVI.