Concept

Environmental effects of shipping

Summary
The environmental effects of shipping include air pollution, water pollution, acoustic, and oil pollution. Ships are responsible for more than 18% of nitrogen oxides pollution, and 3% of greenhouse gas emissions. Although ships are the most energy-efficient method to move a given mass of cargo a given distance, the sheer size of the industry means that it has a significant effect on the environment. The annual increasing amount of shipping overwhelms gains in efficiency, such as from slow-steaming. The growth in tonne-kilometers of sea shipment has averaged 4 percent yearly since the 1990s, and it has grown by a factor of 5 since the 1970s. The fact that shipping enjoys substantial tax privileges has contributed to the growing emissions. Ballast water Ballast water discharge and the environment Ballast water discharges by ships can have a negative impact on the marine environment.
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