Ocean-going ships are a major unregulated air pollution source.
Links
[1] https://www.sej.org/publications/tipsheet/due-out-soon-tti-mobility-study
[2] https://www.sej.org/category/sej-publication/tipsheet
[3] https://www.sej.org/category/topics-beat/cities-towns
[4] https://www.sej.org/category/topics-beat/transportation
[5] https://www.sej.org/category/topics-beat/people-population
[6] https://www.sej.org/category/region/national
[7] https://www.sej.org/taxonomy/term/81
[8] https://www.sej.org/publications/tipsheet/plug-in-hybrids-technology-rolls-closer-reality
[9] https://www.sej.org/category/topics-beat/energy
[10] https://www.sej.org/category/topics-beat/technology
[11] https://www.sej.org/publications/tipsheet/feds-report-climate-change-transportation-connection
[12] https://www.sej.org/category/topics-beat/climate-change
[13] https://www.sej.org/category/topics-beat/air
[14] https://www.sej.org/category/topics-beat/pollution
[15] https://www.sej.org/category/topics-beat/policy
[16] https://www.sej.org/publications/tipsheet/air-pollution-from-ships-new-laws-new-science-0
[17] https://www.sej.org/category/region/international
[18] https://www.sej.org/publications/tipsheet/plummeting-suv-prices-hit-local-car-dealers-8212-and-newspapers
[19] https://www.sej.org/category/topics-beat/transportation?page=140
[20] https://www.sej.org/category/topics-beat/transportation?page=133
[21] https://www.sej.org/category/topics-beat/transportation?page=134
[22] https://www.sej.org/category/topics-beat/transportation?page=135
[23] https://www.sej.org/category/topics-beat/transportation?page=136
[24] https://www.sej.org/category/topics-beat/transportation?page=137
[25] https://www.sej.org/category/topics-beat/transportation?page=138
[26] https://www.sej.org/category/topics-beat/transportation?page=139