How One Shipping Jam Can Stop Your Daily Bread

<p>In this episode, we discuss the ships that carry grains, metals and minerals from where they are found or produced, to where they are needed. Shipping prices rise and fall with changing demand for goods; and changing supplies. Blocked passages, recessions or melting ice all affect where these ships can go, and how fast and cheaply we can buy the commodities we use every day.</p>