Kgnu - How On Earth

500 Women Scientists (starts 3:01) Ecologist Jane Zelikova explains how an acquaintance while at CU-Boulder led to an open letter she co-authored with Kelly Ramirez about science . . . and this ultimately launched an advocacy group.  Over 19,000 women scientists have joined 500 Women Scientists.  They have on line and also local community face-to-face discussions, and they plan to be part of Earth Day's March for Science. Tracking Methane Leaks with Google Street View Cars (starts 10:00) Colorado State University biologist Joe Von Fischer is on a mission to reduce pollution from leaking natural gas lines and their potent greenhouse gas, methane.  Partnering with the non-profit Environmental Defense Fund  and Google Earth Outreach, his team uses Google Street View cars for a first-of-its-kind, comprehensive inventory of urban methane leaks to display on Methane Leak Maps.  A New Jersey utility plans nearly $1 billion of leaky gas line upgrades guided in part by this CSU data. Host/Producer/Engineer: Shelley Sc