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Table 9 Effect of varying zero-carbon ship date on committed emissions, versus carbon budgets

From: Shipping and the Paris climate agreement: a focus on committed emissions

  Emissions in MtCO2  
Existing ships Replacement and additional ships Total Carbon budget for 50% 1.5 °C Total as a % of a 50% 1.5 °C budget
Zero-carbon fuel ships available from 2030, fully deployed in 10 years, no operational/speed measures 1722 430 2152 1670 129%
Zero-carbon fuel ships available from 2035, fully deployed in 10 years, no operational/speed measures 2027 740 2767 1670 166%