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International Maritime Organization (IMO) adopts revised strategy to reduce GHG emissions from international shipping.

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Member States of the International Maritime Organization (IMO), meeting at the Marine Environment Protection Committee (MEPC 80) earlier this month, adopted the 2023 IMO Strategy on Reduction of GHG Emissions from Ships. The Marine Environment Protection Committee (MEPC) addresses environmental issues under IMO’s remit.

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EPA, US Coast Guard to enforce air pollution requirements for vessels operating in US waters

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Coast Guard (USCG) will jointly enforce US and international air pollution requirements for vessels operating in US waters. The large marine diesel engines that provide propulsion and auxiliary power on many ocean-going vessels emit significant amounts of pollution. Earlier post.). million tons per year.

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Research shows clean fuel-use for ships off California coast extremely effective in reducing sulfur dioxide pollution

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Data collected during a major 2010 state-federal atmospheric research project show that the first-in-the-nation regulation requiring ocean-going vessels to use clean fuel when near the California coast has been extremely effective in reducing sulfur dioxide pollution from ships, according to the California Air Resources Board (ARB).

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EPA Finalizes Rules for Category 3 Marine Engines

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The US Environmental Protection Agency (EPA) has finalized its new rule for Category 3 marine engines—engines with per-cylinder displacement at or above 30 liters. Air pollution from large ships, such as oil tankers and cargo ships, is expected to grow rapidly as port traffic increases. Earlier post.)

Mariner 170
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Marine Scientists Issue Monaco Declaration Calling for Immediate Action to Reduce Ocean Acidification

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Green areas indicate waters supersaturated with aragonite carbonate and favoring shell formation, with darker color indicating more favorable conditions. Red areas are those where waters are under-saturated in aragonite and so hostile to shell formation by marine organisms, with darker color indicating greater under-saturation.

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Study Concludes That Use of Cellulosic Feedstocks to Meet US Biofuel Requirements Will Still Likely Result in Expansion of the Gulf Dead Zone

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Nitrogen and phosphorus from agricultural fertilizer have been found to promote excess growth of algae in water bodies—a problem that’s common across North America and in many areas of the world. In some cases, decomposition of algae consumes much of the oxygen in the water. Earlier post.). Earlier post.). Michael Griffin and H.

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PowerCell, Siemens to partner on development of marine fuel cell systems; integration into BlueDrive

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The next stage is to extend the energy supply concept to include fuel cells—which are characterized by high efficiency and pollution-free operation. They are low-noise and are based on the almost unlimited availability of water as a resource. PowerCell was founded in 2008 as an industrial spinout from the Volvo Group.

Mariner 186