The Big Four: Simple Swaps to Start Your Journey Start your journey by tackling the four most common single-use plastic culprits. These are the easiest to substitute and provide the greatest immediate impact. The Problem Plastic The Ocean-Friendly Swap Why It Matters Plastic Shopping Bags Reusable Tote Bags  (Cloth, Canvas, or Jute) A single reusable bag can replace hundreds of single-use bags that often escape landfills and pollute waterways. Tip:  Store a few foldable bags