Introducing: Elements / How BART Track Width Affects Your Commute

Today we're launching a new Crosscurrents series: Elements. It's a collection of stories about the four most elemental ingredients of life — air, water, earth, and fire — and how they’re being reshaped by climate change. Today's story takes us to the Sacramento-San Joaquin Delta, the front lines of California’s water war. Then, the original vision for BART.