For years, the transport sector has been looking at solutions to reduce its carbon footprint. A wide range of stakeholders has taken part in the public debate on transport and climate change, yet one mode has remained largely absent from the conversation: maritime transport.
Tackling emissions from the shipping industry is just as critical as it is for other modes of transport. First, international maritime transport accounts for the lion’s share of global freight transport: ships carry around 80% of the volume of all world trade and 70% of its value. In addition, although shipping is considered the most energy-efficient mode of transport, it still uses huge amounts of so-called bunker fuels, a byproduct of crude oil refining that takes a heavy toll on the environment.
Several key global players are now calling on the maritime sector to challenge the status quo and limit its climate impact. From our perspective, we see at least three major reasons that can explain why emissions from maritime transport are becoming a global priority.
Harsh, a civil engineer from Surendranagar, the western State of Gujarat in India, proudly has a collection of supercars recently delivered from Germany. They are all brand new with sleek designs, glossy paint, and fully loaded with state-of-the-art features. One of them is a 600 horse-power monster, another is the first of its kind in India.
Hybrid and electric buses may be the future of public transport. But today, they are costlier than their diesel equivalents. Therefore, their implementation requires that private operators be subsidized, or that the higher costs for public operators be covered. For now there are more efficient alternatives for reducing GHG and local emissions.
The most significant emissions reduction will not come from the vehicles; it will come from people leaving their cars at home.
Let’s take the example of a Mexican commuter who chooses whether to ride a bus or drive to work each morning. If she drives, her commute will generate 8kg of CO2, vs. only 1.5kg when riding a diesel bus. By making the greener choice, she is saving up to 6.5kg of CO2. With a hybrid bus, that same ride would emit 1kg of CO2, and zero emission with an electric (assuming zero-emission grid)—translating into additional savings of 0.5kg and 1.5kg over a diesel bus, respectively. The extra savings are welcome, of course, but they pale in comparison to the emissions reduction generated by shifting from a private car to a public bus.
If we analyze a whole system instead of an individual, technology’s potential to reduce emissions gains importance, but is still lower than that of modal shift. That means we first need to focus on providing incentives for drivers to leave their cars behind and turn to public transit. When a bus system with exclusive lanes opens, for instance, 1%-5% of passengers are likely to be new riders who used to drive and made a conscious decision to switch. This proportion can increase to 10-15% with the right ancillary interventions, such as providing non-motorized transport infrastructure, improving accessibility and service quality.
Another great source of emission savings is a more efficient system. We have seen reductions of up to 30% in vehicle-kms after a system reorganization. The following graph compares the potential emission reductions of modal shift and fleet rationalization by shifting vehicles to hybrid (left column) or electric (right column) technology.
Urbanization and rising incomes have been driving rapid motorization across Asia, Africa, and Latin America. While cities are currently home to 50% of the global population, that proportion is expected to increase to 70% by 2050. At the same time, business-as-usual trends suggest we could see an additional 1 billon cars by 2050, most of which will have to squeeze into the already crowded streets of Indian, Chinese, and African cities.
If no action is taken, these cars threaten literally to choke tomorrow’s cities, bringing with them a host of negative consequences that would seriously undermine the overall benefits of urbanization: lowered productivity from constant congestion; local pollution and rising carbon emissions; road traffic deaths and injuries; rising inequity and social division.
However, after a century of relatively small incremental progress, disruptive changes in the world of automotive technology could have fundamental implications for sustainability.
What are these megatrends, and how can they reshape the future of urban mobility?
In May last year, key stakeholders joined the World Bank Group in calling for global and more concerted action to address the climate impact of transport while ensuring mobility for everyone. More recently, the Secretary-General’s High-Level Advisory Group on Sustainable Transport noted, in its final recommendations to Ban Ki-Moon, emphasized the need for “coalitions or partnership networks” to “strengthen coherence” for scaling up sustainable transport, as well as establishing monitoring and evaluation frameworks. These issues have been raised at Habitat III, COP22 and at the Global Sustainable Transport Conference in Ashgabat.
As the global community readies itself to move from commitments to implementation, what can transport learn from similar initiatives in other sectors, such as Sustainable Energy for All (SE4All)?
Last year marked an important tipping point: for the first time, half of the global population lives in cities. Cities currently add 1.4 million people each week and this population growth comes with new buildings, roads and transport systems.
In fact, 75 percent of the infrastructure that will be in place by 2050 does not exist today. With cities poised to invest now in infrastructure that will last for decades, huge opportunities lie ahead. But without major shifts now in how we manage established as well as rapidly growing cities, we risk losing out on the potential of urbanization to create more inclusive and prosperous societies.
2015 offers a big chance for the international community to help put cities on a more sustainable path. We at the World Bank and the World Resources Institute (WRI) believe that we must seize this opportunity, because cities and urban mobility are key to a sustainable future.
Business-as-usual urbanization patterns come at a hefty price. Cities already produce 70 percent of energy-related greenhouse gas emissions and traffic crashes claim 1.2 million lives per year, with developing cities carrying the greatest burden.
Traffic congestion cost Rio de Janeiro and São Paulo a combined $43 billion in 2013 alone, equivalent to 8 percent of each city’s GDP. In Beijing, the costs of congestion and air pollution are estimated at 7-15 percent of GDP. Urban sprawl costs the United States alone $400 billion per year.