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The shipping industry sets sail toward a carbon-free future

Cargo-shipping regulators have struck a historic deal to set their dirty fuel-burning industry on a low-carbon course.

On Friday, the International Maritime Organization agreed for the first time to limit greenhouse gas emissions from global shipping. The nonbinding deal marks a critical shift for the sector — which, until last week, was the only major industry without a comprehensive climate plan.

Cargo ships are the linchpin of our modern global economy, transporting roughly 90 percent of everything we buy. They also contribute significantly to planet-warming gases in the atmosphere. If the shipping industry was a country, its total annual emissions would rank in the top 10, between those of Japan and Germany.

Left unchecked, shipping-related emissions are on track to soar by as much as 250 percent by 2050 as global trade expands, the maritime body projects. Such a spike at sea would offset progress in carbon reduction made on land.

Yet with the new emissions targets, observers say, the shipping industry now has more than a fighting chance to clean up its act.

A difficult negotiation

The International Maritime Organization agreed to reduce emissions from global shipping by at least 50 percent from 2008 levels by 2050. The United Nations body also pledged to pursue deeper cuts to meet the Paris Agreement’s more ambitious goal of limiting global warming to 1.5 degrees Celsius, or 2.7 degrees Fahrenheit, above pre-industrial levels.

The hard-won plan follows tense negotiations involving envoys from 173 countries at the organization’s headquarters on the banks of the Thames River in London. The Marshall Islands and other Pacific nations doggedly pushed the most ambitious proposal on the table: a 100-percent reduction in shipping emissions within two decades, a move that would bring the sector in line with the 1.5-degree target. The European Union also championed a plan to curb emissions by 70 to 100 percent by mid-century.

Yet other powerful voices in the room, led by Japan, favored smaller emissions cuts and much longer timelines. The United States and Saudi Arabia, two oil-producing giants, objected outright to any emissions cap. Meanwhile, some shipping executives warned of rising cargo costs and threats to business if aggressive targets were put in place.

“It was extremely difficult,” says Faig Abbasov, a shipping policy expert with Transport & Environment, a nonprofit advocacy group based in Brussels, Belgium. “Almost every day, we were coming back to negotiations in the morning thinking, ‘Will it collapse today, or do we have a chance?’”

Environmental groups and industry leaders alike applauded the resulting compromise, saying it will help accelerate the shift away from high-carbon bunker fuel — the sludgy leftovers from the petroleum-refining process — toward cleaner alternatives, such as fuel cells, batteries, and sustainable biofuels.

The Marshall Islands marshal a deal

Back in 2015, The Marshall Islands was first the nation to urge the International Maritime Organization to adopt a greenhouse gas strategy. It has spearheaded the charge for ambitious shipping rules ever since.

The sprawling Pacific island chain has unique authority on the matter, its officials say, because its livelihood is uniquely intertwined with the shipping industry.

The nation is home to the world’s second-largest ship registry, behind Panama, with nearly 12 percent of all cargo ships flying the Marshallese flag. The country’s 75,000 people depend on cargo ships to supply nearly all of their food. Yet greenhouse-gas emissions from shipping and other industries threaten the nation’s very survival, with rising sea levels, extreme storms, and severe drought pushing islanders from their homes.

At the shipping confab, David Paul, the Marshall Islands’ environment minister, argued the final outcome could mean the difference between a “secure and prosperous life” and an “uncertain future” for children born today on the country’s low-lying coral atolls.

After the deal was struck, Paul returned to his central London hotel room with overcome with relief, if not exhaustion. “Just the fact that we were able to get a deal is historic,” he tells Grist. “We’re optimistic that at least there is a way forward.”

Still, he calls the deal the “bare minimum” of what his country could accept as climate policy. In comparing the organization’s process to a game of baseball, he says last week’s deal is just a single. Effectively, the shipping industry is only on first base enroute to full decarbonization of the sector.

“We realized going into these negotiations that we weren’t going to come away with a home run,” he says. “It’s going to be an incremental process going forward.”

Only the beginning

Last week’s agreement is an initial strategy, with a long-term plan to be adopted in 2023 — after the organization collects emissions data from cargo ships over the period between 2019 and 2021.

In the meantime, regulators are expected to debate binding, enforceable steps that compel — not merely encourage — the industry to reduce its greenhouse gas emissions and a shift away from fossil fuels.

“What was adopted was just IMO’s long-term objective,” Abbasov of Transport & Environment says. “What will actually reduce emissions are the concrete actions. But that’s still to come.”

No specific proposals are on the table just yet, he explains, however, short-term rules will likely target emissions from existing ship operations to keep them from rising any further. That might mean requiring crews to take steps like lowering their vessel’s operating speeds, which reduces power demand and fuel consumption — but would impact shipping time.

Mid-term measures could compel shipping companies to replace carbon-intensive fuels with cleaner alternatives, including fuel cells powered by hydrogen or ammonia — or for smaller vessels, batteries that can recharge at ports. Taking these innovations mainstream, however, would likely require adopting “market-based measures,” such as a tax on carbon emissions.

According to a report by the International Transport Forum, an intergovernmental think tank, “Maximum deployment of currently known technologies could make it possible to reach almost complete decarbonization of maritime shipping by 2035.”

Dozens of small ships around the world are now running on hydrogen and electricity, and a major ferry line in Scandinavia is building two of the largest battery-powered ships to date. Energy-efficient ship designs, smarter logistics systems, and “wind-assisted” technologies, such as spinning rotor sails, are also proven ways to slash emissions.

Still, many of these technologies still remain prohibitively expensive for shipowners or aren’t yet available in sufficient supplies. If every cargo ship today switched to hydrogen fuel cells, for instance, most vessels wouldn’t have enough hydrogen on board to leave the port.

Experts say the International Maritime Organization deal offers a much-needed push for the shipping industry to begin developing and investing in 21st-century technologies.

In a statement, Peter Hinchliffe, secretary general of the International Chamber of Shipping, the industry’s main trade group, summed up last week’s agreement: “We are confident this will give the shipping industry the clear signal it needs to get on with the job of developing zero CO2 fuels.”

Maria Gallucci is the 2017-2018 Energy Journalism Fellow at the University of Texas at Austin.

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The shipping industry sets sail toward a carbon-free future

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