ON DEC. 22, the U.S. Environmental Protection Agency announced final emission standards under the Clean Air Act for new marine diesel engines with per-cylinderrndisplacement at or above 30 liters (called Category 3 marine diesel engines) installed on U.S.-flagged vessels. The final engine standards are equivalent to those adopted in the amendments to Annex VI to the International Con-rnvention for the Prevention of Pollution from Ships (a treaty called "MARPOL"). The emission standards apply in two stages: near-term standards for newly-built engines will apply beginning in 2011, and long-term standards requiring an 80 percent reduction in nitrogen dioxides (NOx) will begin in 2016.
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