The Northwest Ports of Vancouver, BC, Seattle, Tacoma, and the combined container operations of The Northwest Seaport Alliance, are jointly committing to a new vision to phase out emissions from seaport-related activities by 2050. In a collaboration among the four ports, the Northwest Ports Clean Air Strategy seeks to meet this target through changes in equipment, fuels, and infrastructure, supporting cleaner air for local communities and fulfilling the ports’ shared responsibility to help limit global temperature rise to 1.5°C. Building upon the partnerships and successes of the last decade, the ports’ commitment recognizes the urgency of the climate crisis and the need to reduce diesel emissions, especially in areas where air quality is poor while ensuring the continuity and competitiveness of the ports. Engagement across the ports, industry, government, and communities shaped the Strategy vision and objectives. The Strategy covers six sectors of port activity: oceangoing vessels, cargo-handling equipment, trucks, harbor vessels, rail, and port administration and tenant facilities.