Unregulated ships spew greenhouse gases into atmosphere and untreated waste into ocean

(Photo of Chinese freighter from Flickr and photographer fusionpanda/David Grant)

Weekly Angst: When I was on an idyllic cruise in French Polynesia eight years ago, I was astounded at how clear the water was. I’d never seen anything like it. Imagine my dismay to learn our ship was dumping all kinds of waste in the water, befouling this pristine sea. Cruise ships continue to use the ocean as a dumping ground and that’s a huge problem addressed by Friends of the Earth in its latest magazine (see summary below).

But there’s another problem – one I wasn’t aware of in 2000 when I marveled at the clear waters off Bora Bora and Moorea.

Ships help cause global warming.

Shipping worldwide released 1.12 billion metric tons of carbon dioxide last year, according to the International Maritime Organization. That’s equivalent to the CO2 given off by 205 million cars (more than all the cars in the U.S.).

Shipping emits 3% of all CO2 emissions. If it were a country, it would rank No. 6, between Japan and Germany.

With world trade expanding, shipping has grown about 5% a year for the past 3 decades and is likely to continue to do so, according to a new report by Oceana , an international advocacy group. Ships carry 90% of all trade, with more than 90,000 vessels plying the seas, the report says.

Ships don’t just release carbon dioxide, they also spew black carbon (soot), nitrogen oxides and nitrous oxide, all of which add to climate change. The emissions are especially damaging to the fast-warming Arctic, and problems will likely accelerate as the Northwest Passage opens up to more shipping. Soot, for example, absorbs sunlight and can speed the melting of snow and ice.

No regulations
With virtually no regulation, ships are using the cheapest and dirtiest kind of fuel and doing little to become more efficient. Some quick and easy fixes could help the situation, says the Oceana report.

Switching from the worst fuel available, residual oil, to marine diesel or marine gas oil, could reduce CO2 and nitrogen oxides about 5%, particulate matter 63% and nitrous oxide 91%, the report says. Better fuel would also allow for placement of emission controls that would further reduce GHG.

Just slowing down could make a big difference. Ships burn fuel based on speed rather than weight, so cutting back 10% on speed would save 23% in fuel emissions, the report says.

The ports of Los Angeles and Long Beach have financial incentives for reducing speeds within 20 nautical miles of the ports and are getting 80% compliance. With 100% compliance they figure they could cut particulates (including black carbon) in half and reduce nitrogen oxides 37%.

Ships also could cut off their diesel engines when in port and hook up to power lines on shore to furnish electricity.

The industry also could work on more efficient designs for both the vessels and their engines, the report says.

And there is now some experimentation with adding sails or kites to capture wind power on the high seas. That could provide a carbon-free energy boost.

Oceana calls for the EPA to regulate ship emissions within the U.S. Exclusive Economic Zone and the International Maritime Organization to regulate worldwide shipping, because of the substantial impact ships have on climate change.

A coalition of states, environmental groups, government agencies and New York City has served notice to the EPA that it plans to sue the agency for failure to regulate greenhouse gas emissions coming from ships and airplanes. The action follows petitions last October and December that were ignored.

Earthjustice will represent the coalition in the lawsuit against the EPA. Coalition members include Oceana, Friends of the Earth, the Center for Biodiversity, the states of Connecticut and New Jersey, the California Air Resources Board, the California Southern Coast Air Quality Management District and the Pennsylvania Dept. of Environmental Protection.

Other cruise ship problems
In addition to emitting heat-trapping gases, the world’s cruise ships are using the oceans as dumping grounds. As long as they are 3 miles offshore they can and do dump raw sewage directly in the water. When you flush on a ship, that’s where it goes. Within 3 miles they are supposed to use a rudimentary treatment device, but there is little monitoring. They also dump wastewater from sinks, showers, galleys and laundries; oily bilge water; and hazard waste from dry-cleaning and photo processing as well as batteries, paints and fluorescent lights.

How much waste do cruise ships discharge? According to Friends of the Earth, a large ship in one week generates approximately:
• 210,000 gallons of blackwater (human waste)
• 1 million gallons of graywater (showers, galleys, etc.)
• 25,000 gallons of oily bilge water
• More than 130 gallons of hazardous waste.

If that outrages you and you want to take action to help get this dumping under control, call your reps in Washington and tell them to support the Clean Cruise Ship Act of 2008 (more likely to pass in 2009), spearheaded by Sen. Dick Durbin (D-Ill.) and Rep. Sam Farr (D-Calif.)

Somehow, it’s easier to get exorcised over the dumping – something we can see – than greenhouse gases, which we can’t see. But they’re both a problem for our planet, our oceans, and ultimately ourselves.
(Sources: Greenwire, E&E News PM, Oceana, Friends of the Earth)