Scope 3 emissions account for up to 90% of most companies’ total carbon footprint, making supply chain decarbonization essential for meaningful climate action. This comprehensive guide reveals three proven strategies that can reduce transportation emissions by 20% to 80%: modal optimization, route and carrier selection, and fuel switching. Discover how switching from air to sea freight can cut emissions by 98.69%, how rail transport reduces carbon by 86% compared to road, and how strategic carrier selection delivers up to 42% reductions.