![KQED's Perspectives show](https://d3dthqtvwic6y7.cloudfront.net/podcast-covers/000/013/553/small/kqed-perspectives.jpg)
Summary: A fence separates two countries along our southern border, but Carol Arnold notes it also separates an ecosystem from itself.
Summary: A fence separates two countries along our southern border, but Carol Arnold notes it also separates an ecosystem from itself.