![PopTech Audio: PopCasts show](https://d3dthqtvwic6y7.cloudfront.net/podcast-covers/000/053/095/small/poptech-audio-popcasts.jpg)
Summary: <p><a href="http://poptech.org/kim_cobb">Kim Cobb</a> studies the climate variability of the past in order to construct a sense of what we can expect in the future. Having a clearer sense of rainfall, for example, over the next 100 years will be incredibly valuable in informing public policy.</p>