A Big Idea: Solar-Powered Cargo Ships

Toyota has hired two firms to build solar panels to augment the diesel engines on their car-carrying behemoths. The result will be a cut in CO2 emissions of 1 to 2 percent per year, or about 20 tons.

1 minute read

September 4, 2008, 7:00 AM PDT

By Tim Halbur


"Slapping photovoltaic cells on a 60,000-ton boat will cut fuel consumption by 6.5 percent, which seems paltry until you realize the average cargo ship burns 120 gallons per mile. The system Nippon Yusen KK is paying Nippon Oil Corp. $1.4 million to develop will save about 46,800 gallons of fuel carrying all those cars 6,000 miles from Japan to Califonia.

To put that in perspective, if you bought a Toyota that arrived on a solar ship with 4,999 other cars, it would have saved nine gallons of fuel before you ever even saw it.

But solar ships do more than save fuel. They also clear the air. Cargo ships burn "bunker fuel," the truly nasty stuff that literally comes from the bottom of the barrel. It's kind of like the Milwaukee's Best of fossil fuels.

A study published in Environmental Science and Technology found emissions from the bunker fuel cargo ships burn may cause 60,000 deaths worldwide."

Wednesday, September 3, 2008 in Wired

portrait of professional woman

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban Planner

Get top-rated, practical training

Wastewater pouring out from a pipe.

Alabama: Trump Terminates Settlements for Black Communities Harmed By Raw Sewage

Trump deemed the landmark civil rights agreement “illegal DEI and environmental justice policy.”

April 13, 2025 - Inside Climate News

Logo for Planetizen Federal Action Tracker with black and white image of U.S. Capitol with water ripple overlay.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

April 16, 2025 - Diana Ionescu

Black and white photos of camp made up of small 'earthquake shacks' in Dolores Park in 1906 after the San Francisco earthquake.

The 120 Year Old Tiny Home Villages That Sheltered San Francisco’s Earthquake Refugees

More than a century ago, San Francisco mobilized to house thousands of residents displaced by the 1906 earthquake. Could their strategy offer a model for the present?

April 15, 2025 - Charles F. Bloszies

People walking up and down stairs in New York City subway station.

In Both Crashes and Crime, Public Transportation is Far Safer than Driving

Contrary to popular assumptions, public transportation has far lower crash and crime rates than automobile travel. For safer communities, improve and encourage transit travel.

April 18 - Scientific American

White public transit bus with bike on front bike rack in Nashville, Tennessee.

Report: Zoning Reforms Should Complement Nashville’s Ambitious Transit Plan

Without reform, restrictive zoning codes will limit the impact of the city’s planned transit expansion and could exclude some of the residents who depend on transit the most.

April 18 - Bloomberg CityLab

An engineer controlling a quality of water ,aerated activated sludge tank at a waste water treatment plant.

Judge Orders Release of Frozen IRA, IIJA Funding

The decision is a victory for environmental groups who charged that freezing funds for critical infrastructure and disaster response programs caused “real and irreparable harm” to communities.

April 18 - Smart Cities Dive