The U.N. agency that oversees the global shipping industry reached a deal to reduce its greenhouse gas emissions to net zero "by or about 2050."
The International Maritime Organization's deal announced on Friday includes interim goals of slashing carbon pollution by 20-30% by 2030 and 70-80% by 2040. If accomplished, the goals would be significant because the industry accounts for 2.9% of global greenhouse gas emissions. Diesel still powers most of the world's 100,000 cargo ships.