As far as commercial transportation goes, shipping is more environmentally friendly than many others, say air transport or trucking.
Freighters carry large loads of goods at steady speeds across the oceans of the world. Carbon emissions per item are relatively low.
The Lady Viking's fuel cell runs on liquified natural gas and could be configured to use methane
There are ways to make them even lower. A Norwegian ship dubbed the Viking Lady is the first to run a liquefied natural gas fuel cell with the aim of cutting greenhouse gas emissions.
The Viking Lady was described in a recent story published in Scientific American. While the fuel cell is still in testing and not yet turning the propellers, it holds promise. Estimates are that carbon emissions on the ship should fall 50 percent – more if the cell is configured to run methane.
The new technology requires some reworking of the marine environment. Storage tanks for the hydrogen and CO2 necessary to start the fuel cell sit at the stern of the 277-foot ship, as do machines to turn the liquid fuel to gas.
The Viking Lady, painted a bright orange, also uses natural gas to fire separate on-board turbines that today drive the boat by providing electricity to its engines.
If also goes well, the fuel cell could begin taking over propulsion duties by next year. It will be eagerly awaited. Shipping contributes 3 percent of global greenhouse gas emissions, with one ship equal to about 22,000 cars.
The new approach to maritime trade could change this.
[...] Freighter Test Fuel Cell To Cut Greenhouse Gases 50% « TechPulse 360 [...]
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