The Short Version
The 11% figure is real but applies to the entire logistics sector — freight transport plus warehousing and port operations — not to "international logistics and shipping" alone. Authoritative sources such as ISO and the World Economic Forum attribute roughly 8% of global emissions to freight transport, rising to ~11% only when warehousing and port infrastructure are included. International maritime shipping specifically accounts for approximately 2–3% of global greenhouse gas emissions according to the IMO, UN, and OECD. The claim misattributes a broader statistic to a narrower category.