Who she is: An atmospheric scientist (climatologist) and political science professor as well as director of the Climate Science Center at Texas Tech University.
Why she's important: As an evangelical Christian, Katharine wrote the book A Climate For Change: Global Warming Facts For Faith-Based Decisions, which she, along with her pastor husband, hopes will help Christians accept the science behind climate change and create initiatives to act on its environmental effects. "It's a little like coming out of the closet, admitting that you are a Christian and a scientist," Katharine has said of dealing with the opposition she has met during her talks around the country.
Who/what she influences: Local governments affected by climate change and everyday people skeptical of the science behind global warming.
Source: YouTube user Years of Living Dangerously