Emissions Control Areas (ECAs) are zones with stricter emission limits on what pollutants?

Emissions Control Areas (ECAs) are zones with stricter emission limits on what pollutants?

• A. SOx and NOx only
• B. NOx and particulates
• C. SOx, NOx, and particulates
• D. CO2 and methane

Answer: (C)

Emissions Control Areas are designed to improve air quality around ports and coastal areas by tightening limits on pollutants released from ships. The most important targets are sulfur oxides (SOx) and nitrogen oxides (NOx), which come directly from burning ship fuel and high-temperature engine combustion. In these zones, stricter SOx limits reduce sulfur in fuel and thus SOx in exhaust, while NOx limits push engines to burn cleaner and less polluting. Particulate matter is also addressed because it accompanies exhaust and affects health and visibility, so particulate emissions are effectively reduced alongside SOx and NOx through cleaner fuels and engines. CO2 and methane aren’t the focus of ECAs, since those are greenhouse gases addressed by climate-oriented measures rather than the local air-quality rules that define ECAs. That's why the best answer includes SOx, NOx, and particulates.

Emissions Control Areas are designed to improve air quality around ports and coastal areas by tightening limits on pollutants released from ships. The most important targets are sulfur oxides (SOx) and nitrogen oxides (NOx), which come directly from burning ship fuel and high-temperature engine combustion. In these zones, stricter SOx limits reduce sulfur in fuel and thus SOx in exhaust, while NOx limits push engines to burn cleaner and less polluting. Particulate matter is also addressed because it accompanies exhaust and affects health and visibility, so particulate emissions are effectively reduced alongside SOx and NOx through cleaner fuels and engines. CO2 and methane aren’t the focus of ECAs, since those are greenhouse gases addressed by climate-oriented measures rather than the local air-quality rules that define ECAs. That's why the best answer includes SOx, NOx, and particulates.