3. 2 Comparison of Air Pollutant Emissions by Region
To examine air pollutant emission characteristics and changes in emissions by region in Korea, the 17 dos (provinces) and metropolitan cities were grouped into the following five regions: SMA (Seoul, Incheon, and Gyeonggi-do), Gangwon region (Gangwon-do), Chungcheong region (Daejeon, Sejong, Chungcheongbuk-do, and Chungcheongnam-do), Honam region (Gwangju, Jeollabuk-do, and Jeollanam-do), and Yeongnam region (Busan, Daegu, Ulsan, Gyeongsangbuk-do, and Gyeongsangnam-do) (Table 4).
Table 4.
Classification of administrative districts by region.
Region |
Administrative divisions |
Region |
Administrative divisions |
SMA |
Seoul |
Honam region |
Gwangju |
Incheon |
Jeollabuk- do
Jeollanam-do |
Gyeonggi-do |
Yeongnam region |
Busan |
Gangwon region |
Gangwon-do |
Daegu |
Chungcheong region |
Daejeon |
Ulsan |
Sejong |
Gyeongsanbuk-do
Gyeongsangnam-do |
Chungcheongbuk-do |
Others |
Jeju Island |
Chungcheongnam-do |
|
|
To examine pollutant emission characteristics by region, the current status of factors related to major pollutant emission, such as population, economy, large-scale places of business, cars, and construction machinery, was analyzed. For the analysis of the current status of the economy by region, Gross Regional Domestic Product (GRDP) data published by the Korean Statistical Information Service (KOSIS) were utilized. GRDP is the sum of the market prices of all final goods and services produced in a fixed economic zone for a certain period of time. It is used to establish local financial and economic policies because it comprehensively represents the status of the local economy. As of 2018, SMA showed the highest values and proportions for both population (49.8%) and GRDP (52.2%), followed by the Yeongnam, Chungcheong, Honam, and Gangwon regions, and Jeju Island (Table 5).
Table 5.
GRDP by region in 2018.
|
Population (thousands) |
GRDP (trillion) |
Nationwide |
51,826 |
100.0% |
1,903 |
100.0% |
SMA |
25,797 |
49.8% |
992 |
52.2% |
Gangwon region |
1,543 |
3.0% |
47 |
2.5% |
Chungcheong region |
5,530 |
10.7% |
238 |
12.5% |
Honam region |
5,179 |
10.0% |
166 |
8.7% |
Yeongnam region |
13,110 |
25.3% |
440 |
23.1% |
Jeju Island |
667 |
1.3% |
20 |
1.1% |
Source: KOSIS (Korean Statistical Information Service)
According to the analysis results, the Yeongnam region had the largest number of large-scale places of business (annual pollutant emissions>20 tons; 37.5%), followed by SMA (24.4%) and the Chungcheong region (19.1%). For the analysis of construction machinery, SMA had the largest number of registered vehicles (44.5%) and excavators (33.5%), followed by the Yeongnam region (26.8 and 27.3%, respectively) (Table 6).
Table 6.
Current Status of places of business and the number of registered cars and construction machinery by region in 2018
Region |
Places of business1) |
Cars2) |
Construction machinery3) |
Number of registrations |
Proportion (%) |
Number of registrations |
Proportion (%) |
Number of registrations |
Proportion (%) |
SMA |
1,000 |
24.4 |
10,319,869 |
44.5 |
168,093 |
33.5 |
Gangwon region |
123 |
3.0 |
766,374 |
3.3 |
26,442 |
5.3 |
Chungcheong region |
783 |
19.1 |
2,726,164 |
11.7 |
79,053 |
15.8 |
Honam region |
644 |
15.7% |
2,612,334 |
11.3% |
82,348 |
16.4% |
Yeongnam region |
1,539 |
37.5% |
6,224,236 |
26.8% |
136,966 |
27.3% |
Jeju Island |
15 |
0.4% |
553,578 |
2.4% |
8,744 |
1.7% |
Total |
4,104 |
100.0% |
23,202,555 |
100.0% |
501,646 |
100.0% |
*Sources: 1) Stack Emission Management System (SEMS), National Air Emission Inventory and Research Center, Ministry of Environment (Places of business represent large-scale places of business with annual NOX, SOX, and TSP emissions>20 tons)
2) Number of registered cars: KOSIS (Korean Statistical Information Service)
3) Number of registered construction machinery: Ministry of Land, Infrastructure and Transport
Table 7 and Fig. 3 show the emissions by administrative division and region in 2018. SMA exhibited the largest emissions of CO (238,525 tons; 29.5%), NOX (322,296 tons; 27.9%), and BC (5,215 tons; 33.5%). The Yeongnam region recorded the largest emissions of SOX (113,601 tons; 37.7%), TSP (189.829 tons; 30.7%), PM10 (72,160 tons; 31.0%), PM2.5 (32,945 tons; 33.5%), VOCs (344,649 tons; 33.3%), and NH3 (81,881 tons; 25.9%).
Table 7.
Air pollutant emissions by administrative divisions in 2018.
(Unit: metric tons/year)
Dos (provinces) and metropolitan cities |
CO |
NOX |
SOX |
TSP |
PM10 |
PM2.5 |
BC |
VOCs |
NH3 |
Total |
808,801 |
1,153,265 |
300,979 |
617,481 |
232,993 |
98,388 |
15,562 |
1,035,636 |
315,975 |
100.0% |
100.0% |
100.0% |
100.0% |
100.0% |
100.0% |
100.0% |
100.0% |
100.0% |
SMA |
Seoul |
59,091 |
88,319 |
1,095 |
31,069 |
15,130 |
3,973 |
1,498 |
72,393 |
3,469 |
7.3% |
7.7% |
0.4% |
5.0% |
6.5% |
4.0% |
9.6% |
7.0% |
1.1% |
Incheon |
42,473 |
54,996 |
12,165 |
22,496 |
7,601 |
2,701 |
607 |
55,061 |
7,166 |
5.3% |
4.8% |
4.0% |
3.6% |
3.3% |
2.7% |
3.9% |
5.3% |
2.3% |
Gyeonggi-do |
136,960 |
178,981 |
8,859 |
84,050 |
31,342 |
10,488 |
3,110 |
190,940 |
47,387 |
16.9% |
15.5% |
2.9% |
13.6% |
13.5% |
10.7% |
20.0% |
18.4% |
15.0% |
Sub total |
238,525 |
322,296 |
22,120 |
137,615 |
54,074 |
17,162 |
5,215 |
318,393 |
58,023 |
29.5% |
27.9% |
7.3% |
22.3% |
23.2% |
17.4% |
33.5% |
30.7% |
18.4% |
Gangwon region |
Gangwon-do |
50,996 |
79,834 |
13,802 |
36,165 |
9,772 |
4,109 |
749 |
30,263 |
14,848 |
6.3% |
6.9% |
4.6% |
5.9% |
4.2% |
4.2% |
4.8% |
2.9% |
4.7% |
Chungcheong region |
Daejeon |
10,660 |
16,051 |
492 |
5,271 |
1,908 |
653 |
219 |
16,758 |
764 |
1.3% |
1.4% |
0.2% |
0.9% |
0.8% |
0.7% |
1.4% |
1.6% |
0.2% |
Sejong |
4,956 |
5,260 |
80 |
2,500 |
1,024 |
345 |
123 |
5,962 |
2,760 |
0.6% |
0.5% |
0.0% |
0.4% |
0.4% |
0.4% |
0.8% |
0.6% |
0.9% |
Chungcheongbuk-do |
42,067 |
60,899 |
7,223 |
32,096 |
9,462 |
3,591 |
853 |
43,144 |
16,981 |
5.2% |
5.3% |
2.4% |
5.2% |
4.1% |
3.7% |
5.5% |
4.2% |
5.4% |
Chungcheongnam-do |
65,226 |
107,613 |
69,989 |
81,841 |
37,203 |
18,129 |
1,318 |
78,132 |
53,163 |
8.1% |
9.3% |
23.3% |
13.3% |
16.0% |
18.4% |
8.5% |
7.5% |
16.8% |
Sub total |
122,909 |
189,823 |
77,784 |
121,708 |
49,598 |
22,719 |
2,513 |
143,997 |
73,667 |
15.2% |
16.5% |
25.8% |
19.7% |
21.3% |
23.1% |
16.1% |
13.9% |
23.3% |
Honam region |
Gwangju |
7,956 |
12,270 |
173 |
5,225 |
1,710 |
546 |
153 |
15,722 |
968 |
1.0% |
1.1% |
0.1% |
0.8% |
0.7% |
0.6% |
1.0% |
1.5% |
0.3% |
Jeollabuk-do |
46,257 |
38,562 |
3,761 |
42,097 |
10,629 |
3,563 |
773 |
69,846 |
35,197 |
5.7% |
3.3% |
1.2% |
6.8% |
4.6% |
3.6% |
5.0% |
6.7% |
11.1% |
Jeollanam-do |
64,643 |
105,269 |
58,621 |
71,464 |
28,206 |
13,156 |
1,130 |
88,958 |
43,727 |
8.0% |
9.1% |
19.5% |
11.6% |
12.1% |
13.4% |
7.3% |
8.6% |
13.8% |
Sub total |
118,856 |
156,101 |
62,555 |
118,787 |
40,545 |
17,265 |
2,056 |
174,525 |
79,892 |
14.7% |
13.5% |
20.8% |
19.2% |
17.4% |
17.5% |
13.2% |
16.9% |
25.3% |
Yeongnam region |
Busan |
26,662 |
49,951 |
7,897 |
17,031 |
6,886 |
2,644 |
525 |
42,340 |
1,620 |
3.3% |
4.3% |
2.6% |
2.8% |
3.0% |
2.7% |
3.4% |
4.1% |
0.5% |
Daegu |
17,213 |
26,370 |
2,595 |
10,708 |
3,911 |
1,294 |
338 |
31,875 |
1,668 |
2.1% |
2.3% |
0.9% |
1.7% |
1.7% |
1.3% |
2.2% |
3.1% |
0.5% |
Ulsan |
31,400 |
48,719 |
42,794 |
8,932 |
4,080 |
2,274 |
298 |
91,961 |
15,129 |
3.9% |
4.2% |
14.2% |
1.4% |
1.8% |
2.3% |
1.9% |
8.9% |
4.8% |
Gyeongsangbuk-do |
96,585 |
104,098 |
37,718 |
107,358 |
45,300 |
22,007 |
2,055 |
89,304 |
36,544 |
11.9% |
9.0% |
12.5% |
17.4% |
19.4% |
22.4% |
13.2% |
8.6% |
11.6% |
Gyeongsangnam-do |
49,199 |
73,050 |
22,596 |
45,799 |
11,984 |
4,726 |
1,031 |
89,168 |
26,920 |
6.1% |
6.3% |
7.5% |
7.4% |
5.1% |
4.8% |
6.6% |
8.6% |
8.5% |
Sub total |
221,058 |
302,187 |
113,601 |
189,829 |
72,160 |
32,945 |
4,248 |
344,649 |
81,881 |
27.3% |
26.2% |
37.7% |
30.7% |
31.0% |
33.5% |
27.3% |
33.3% |
25.9% |
Jeju-do |
|
11,130 |
17,285 |
1,836 |
10,028 |
3,495 |
1,065 |
223 |
9,000 |
7,655 |
1.4% |
1.5% |
0.6% |
1.6% |
1.5% |
1.1% |
1.4% |
0.9% |
2.4% |
Sea* |
|
45,327 |
85,739 |
9,282 |
3,349 |
3,349 |
3,123 |
557 |
14,809 |
8 |
5.6% |
7.4% |
3.1% |
0.5% |
1.4% |
3.2% |
3.6% |
1.4% |
0.0% |
*Sea: Air pollutant emissions from maritime transport such as ships and fishing boats
Fig. 3.
2018 Air pollutant emissions by administrative division (Unit: metric/km2).
The analysis on the major cause of changes in emissions and the comparison of regional and sectoral emissions based on emissions by region and pollutant is presented in the next section.
3. 2. 1 Analysis of Changes in Emissions for SMA
Almost half of the national population of Korea is concentrated in SMA, which consists of Seoul Metropolitan City (the capital), Incheon, and Gyeonggi-do, as it is the center of politics, economy, society, and culture. To improve the air pollution of SMA caused by high population density, traffic congestion, and industrialization, a separate law (Special Act On The Improvement Of Air Quality In Seoul Metropolitan Area, 2003) was enacted. Based on this, the Air Quality Management Plan in Seoul Metropolitan Area (2005) has been established and implemented. The plan includes strengthening of vehicle emission standards, supply of eco-friendly vehicles and expansion of infrastructure, details regarding total air pollutant emissions limitations for places of business, mandatory installation of VRU at gas stations, reinforcing the management of fugitive dust from vacant lands and places of business.
The population and economy indicators showed that SMA had the largest population (approximately 49.8%) and recorded the highest GRDP (approximately 52.2%) in 2018. The electric, electronic, and precision instrument manufacturing sector constituted the highest proportion of GRDP.
Air pollutant emissions from SMA in 2018 were estimated to be 17,162 tons of PM2.5, 22,120 tons of SOX, 322,296 tons of NOX, 318,393 tons of VOCs, and 58,023 tons of NH3. In addition, the contributions of each pollutant to the national emissions were as follows: PM2.5 (17.4%), SOX (7.3%), NOX (27.9%), VOCs (30.7%), NH3 (18.4%). PM2.5 and VOCs emissions increased by 4.4% and 1.1% compared to the previous year, while SOX, NOX, and NH3 emissions decreased by 10.8%, 0.2%, and 0.2%, respectively. Meanwhile, the contributions of NOX and SOX to the emissions from the road and industry sector respectively were the largest compared to other pollutants. In addition, PM2.5, VOCs, and NH3 contributed the largest to the emissions from the everyday activities and others sector (Fig. 4).
Fig. 4.
Air pollutant emissions from SMA in 2018.
SMA’s emissions from the road transport recorded the largest compared to other regions as it recorded the largest number of vehicles registered (44.5%), and VKT (40.5%) (PM2.5 36.1%, SOX 40.2%, NOX 38.9%, VOCs 46.9%, and NH3 40.9%). SOX, NOX, VOCs, and NH3 emissions decreased compared to those of the previous year. This is due to the replacement of old vehicles with new ones, which offset the effects of the increase in the number of vehicle registrations (3.1%, 307,000 units) and VKT (2.7%, 3,428 million km).
SMA’s emissions from the non-transport sector were also the largest compared to those of other regions. (NOX: 27.5%, PM2.5: 28.0%, VOCs: 27.5%, and NH3: 27.6%). The region’s PM2.5 and NOX emissions from the construction machinery increased by 12.3% (366 tons) and 11.3% (6,867 tons) compared to those in the previous year. This was because construction machinery registrations (including excavators) increased by 9.9% (20,671 units) and the swaths of construction sites increased by 7.0% (5,001 m2). VOCs emissions increased by 23.7% (3,568 tons) compared to that of the previous year. This was mainly because of the decrease in the number of registered leisure boat using gasoline in Incheon (by 26.4%, 880 units).
SOX emissions decreased by 10.8% (2,686 tons) compared to those of the previous year. In particular, SOX emissions from the industry sector decreased by a large margin (10.3%, 1,077 tons). This was due to the decreased consumption of industrial bituminous coal (66,000 tons, 19.5%) in Gyeonggi-do.
3. 2. 2 Analysis of Changes in Emissions for the Gangwon Region
Most of the Gangwon region, which is located in the northeastern part of Korea, is mountainous. Under the influence of such geographical conditions, industrial complexes are underdeveloped, which led to relatively low proportion of manufacturing-based industries.
The population and economy indicators showed that this region accounted for approximately 3.0% of the national population as of 2018. The GRDP of the region was approximately 2.5% of the national GRDP. More specifically, the public administration, defense and social security-related administration sector showed the highest proportion in GRDP. The manufacturing sector represented approximately 0.9% of the national GRDP.
Air pollutant emissions from the Gangwon region in 2018 were estimated to be 4,109 tons of PM2.5, 13,802 tons of SOX, 79,834 tons of NOX, 30,263 tons of VOCs, and 14,848 tons of NH3. In addition, the contributions of each pollutant to the national emissions were as follows: PM2.5 (4.2%), SOX (4.6%), NOX (6.9%), VOCs (2.9%), NH3 (4.7%). PM2.5, SOX, and NOX emissions decreased by 0.1%, 2.3%, and 7.2%, respectively, compared to those of the previous year, whereas VOCs and NH3 increased by 6.7% and 7.6%, respectively. Meanwhile, in the Gangwon region, the contributions of PM2.5, VOCs, and NH3 to the emissions from everyday activities and others sector respectively were the largest compared to other pollutants. In addition, NOX and SOX contributed the largest to the emissions from the industry sector (Fig. 5).
Fig. 5.
Air pollutant emissions from the Gangwon region in 2018.
Emissions from the energy sector increased compared to those of the previous year (NOX: 10.9%, SOX: 29.6%, PM2.5: 66.8%, VOCs: 50.2%, and NH3: 58.0%). This was because the consumption of coal (including bituminous coal) and LNG increased by 43.7% (3,228,000 tons) and 62.2% (269 million m3), respectively, due to the operation of new thermal power plants (coal and LNG).
VOCs emissions from the non-road transport sector increased by 38.0% (1,449 tons) compared to those of the previous year. This was mainly because of the increase in the number of registered leisure boat (by 47.2%, 1,570 units).
On the other hand, NOX and SOX emissions from the industry sector decreased by 10.4% (4,992 tons) and 9.1% (764 tons), respectively, compared to those of the previous year. This was due to the reduction in the fuel (bituminous coal) consumption of cement production facilities. NH3 emissions increased by 67.1% compared to those in the previous year. This was mainly because emissions from DeNOX facilities in the industry sector increased by 67.7% (826 tons).
3. 2. 3 Analysis of Changes in Emissions for the Chungcheong region
The Chungcheong region, located in the center of Korea, consists of Daejeon Metropolitan City, Sejong Special Self-governing City, Chungcheongnam-do, and Chungcheongbuk-do. In the western part of the region, thermal power plants (coal and LNG), petrochemical complexes, iron and steel mills, and large manufacturing industries are located near trading ports. Meanwhile, in the eastern part of the region, high-value-added manufacturing industries (e.g., medicine and electronics) and food manufacturing industries are located.
The population and economy indicators showed that the region represented approximately 10.7% of the national population as of 2018. The GRDP of the region was approximately 12.5% of the national GRDP. The electric, electronic, and precision instrument manufacturing sector showed the highest proportion in GRDP, followed by the coal and petrochemical product manufacturing sector.
Air pollutant emissions from the Chungcheong region in 2018 were estimated to be 22,719 tons of PM2.5, 77,784 tons of SOX, 189,823 tons of NOX, 143,997 tons of VOCs, and 73,667 tons of NH3. In addition, the contributions of each pollutant to the national emissions were as follows: PM2.5 (23.1%), SOX (25.8%), NOX (16.5%), VOCs (13.9%), NH3 (23.3%). PM2.5 and NH3 emissions increased by 9.5% and 1.5%, respectively, compared to the previous year, whereas SOX, NOX, and VOCs emissions decreased by 1.8%, 5.9%, and 3.8%, respectively. Meanwhile, in the Chungcheong region, the contributions of PM2.5, NOX and SOX to the emissions from the industry sector respectively were the largest compared to other pollutants. In addition, VOCs and NH3 contributed the largest to the emissions from the everyday activities and others sector (Fig. 6).
Fig. 6.
Air pollutant emissions from the Chungcheong region in 2018.
In the case of the Chungcheong region, pollutant emissions from the energy sector were large compared to other regions (PM2.5: 37.4%, SOX: 36.9%, NOX: 25.6%). NOX and SOX emissions from the energy sector decreased by 24.1% (7,838 tons) and 16.3% (4,081 tons), respectively, compared to those of the previous year. This was because of the reinforcement of the power plant emission management, which offset the effects of increased consumption of coal (including bituminous coal) in the coal-fired power plants of the region (1.0%, 444,000 tons) compared to the previous year.
PM2.5 and SOX emissions from the industry sector increased by 20.1% (2,242 tons) and 6.6% (3,295 tons) compared to those of the previous year. This was because of the increase in anthracite consumption in the primary metal industry (23.3%).
VOCs emissions decreased by 3.8% (5,737 tons) compared to those of the previous year. More specifically, VOCs emissions from the everyday activities and others sector decreased by 7.3% (7,246 tons) compared to those of the previous year. This was due to the emissions reductions (6,501 tons, 22.5%) caused by the decrease (21.8%) in the consumption of paint used for architecture and buildings in the region.
Meanwhile, NH3 emissions represented 23.3% of the national emissions, and increased by 1.5% (1,084 tons) compared to those of the previous year. This was mainly because the emissions from the agriculture-manure management sector increased by 1.3% (720 tons), which was caused by a 3.3% (1,606,000 units) increase in the number of livestock population, including cows, pigs, and chickens.
3. 2. 4 Analysis of Changes in Emissions for the Honam Region
The Honam region, which consists of Gwangju Metropolitan City, Jeollabuk-do, and Jeollanam-do, is located in the southwestern part of Korea. It is Korea’s representative breadbasket with wide plains, such as Honam and Naju plains. Thermal power plants (coal and LNG) and the nation’s largest petrochemical complex are located in Yeosu, a southern part of the region, in addition to nearby iron and steel mills in Gwangyang.
The population and economy indicators showed that the region accounted for approximately 10.0% of the national population as of 2018. The GRDP of the region is approximately 8.7% of the national GRDP. More specifically, the coal and petrochemical product manufacturing sector showed the highest proportion of GRDP.
Air pollutant emissions from the Honam region in 2018 were estimated to be 17,265 tons of PM2.5, 62,5554 tons of SOX, 156,101 tons of NOX, 174,525 tons of VOCs, and 79,892 tons of NH3. In addition, the contributions of each pollutant to the national emissions were as follows: PM2.5 (17.5%), SOX (20.8%), NOX (13.5%), VOCs (16.9%), NH3 (25.3%). PM2.5 and NH3 emissions increased by 11.7% and 6.3%, respectively, compared to those of the previous year, whereas SOX, NOX, and VOCs decreased by 0.1%, 0.8%, and 2.5%, respectively. Meanwhile, the contributions of PM2.5, and SOX to the emissions from the industry sector, the contributions of NOX to the emissions from the road sector, the contributions of VOCs and NH3 emissions from the everyday activities and others sector were the largest in the region (Fig. 7).
Fig. 7.
Air pollutant emissions from the Honam region in 2018.
In the case of the industry sector, PM2.5, SOX, and NOX emissions increased by 30.9% (2,010 tons), 5.8% (2,671 tons), and 6.4% (2,666 tons), respectively, compared to those of the previous year. This was mainly because the increased consumption of coal, including anthracite, in the manufacturing sector (13.3%, 318,000 tons) in Jeollanam-do.
NOX emissions from the road transport and non-road transport sectors decreased by 5.1% (2,611 tons) and 5.9% (2,078 tons), respectively, compared to those of the previous year. For road transport, emissions from the sector decreased because of the decrease in the number of old cars registrations and the replacement of old cars with new ones, which offset the impacts of the increase in the number of car registrations (3.0%, 77,000 units) in the region. In the case of the non-road transport, NOX emissions decreased mainly because of the decrease in emissions from the non-road-construction machinery sector (13.6%, 1,674 tons) caused by the reduction in the number of registered construction machinery (14.6%, 6,162 units) in the region.
VOCs emissions decreased by 2.5% (4,561 tons) compared to those in the previous year. More specifically, this was because emissions by paint that is used for shipbuilding decreased by 16.9% (2,528 tons). For paint consumption, it decreased by 17.1% (4,606 kL) compared to those in the previous year.
NH3 emissions increased by 6.3% (4,722 tons) compared to those in the previous year. The Honam region exhibited the largest NH3 emissions in the country from the everyday activities and others sector. This was due to the 21.0% (1,335 tons) increase in emissions caused by a 20.8% (44,000 tons) increase in fertilizer consumption in farmlands, and the 5.0% (2,873 tons) increase in NH3 emissions from the manure sector caused by a 10.2% (5,902,000 units) increase in the number of livestock population.
3. 2. 5 Analysis of Changes in Emissions for the Yeongnam Region
The Yeongnam region, which consists of Busan Metropolitan City, Daegu Metropolitan City, Ulsan Metropolitan City, Gyeongsangbuk-do, and Gyeongsangnamdo, is located in the southeastern part of Korea. Iron and steel manufacturing, shipbuilding, automobile manufacturing, and petrochemical industries as well as the nation’s largest trading port (Busan Port) are located in the region.
The population and economy indicators showed that the region represented approximately 25.3% of the national population as of 2018. The GRDP of the region is approximately 23.1% of the national GRDP. More specifically, the machinery transport equipment, and other product manufacturing sector showed the highest proportion of GRDP, followed by electric, electronic, and precision instrument manufacturing and non-metallic mineral and metal product manufacturing sector.
Air pollutant emissions from the Yeongnam region in 2018 were estimated to be 32,945 tons of PM2.5, 113,601 tons of SOX, 302,187 tons of NOX, 344,649 tons of VOCs, and 81,881 tons of NH3. In addition, the contributions of each pollutant to the national emissions were as follows: PM2.5 (33.5%), SOX (37.7%), NOX (26.2%), VOCs (33.3%), NH3 (25.9%). PM2.5 and NH3 emissions increased by 7.0 and 1.2%, respectively, compared to those in the previous year, whereas SOX, NOX, and VOCs emissions decreased by 6.5%, 3.8%, and 1.8%, respectively. Meanwhile, the contributions of PM2.5 and SOX to the emissions from the industry sector were the largest in the region. In addition, VOCs and NH3 contributed the largest to the emissions from the everyday activities and others sector (Fig. 8).
Fig. 8.
Air pollutant emissions from the Yeongnam region in 2018.
In the case of the Yeongnam region, air pollutant emissions from the industry sector were found to be the largest in Korea. In this region, emissions from the industry sector were 17,459 tons of PM2.5, 79,097 tons of SOX, 76,780 tons of NOX, 95,344 tons of VOCs, and 17,153 tons of NH3. Each pollutant represented 43.1% (PM2.5), 40.1% (SOX), 31.2% (NOX), 38.2% (VOCs), and 36.6% (NH3) of national emissions from the industry sector, respectively. PM2.5 and NOX emissions from the sector increased by 15.8% (2,380 tons) and 7.7% (5,459 tons), respectively, compared to those in the previous year. This was mainly because the consumption of coal, including anthracite, in the manufacturing sector increased by 15.1% (504 tons) compared to that in the previous year.
PM2.5 emissions increased by 7.0% (2,156 tons) compared to those of the previous year. This was because of the increase in the consumption of anthracite in the industry sector. Meanwhile, NH3 emissions also increased by 1.2% (982 tons) compared to the previous year. This was mainly because emissions from DeNOX facilities in the industry sector increased by 55.0% (1,282 tons).
NOX emissions decreased by 3.8% (12,100 tons) compared to those in the previous year. These emissions decreased by 18.7% (5,854 tons) and 7.9% (9,581 tons) in the energy production and road transport sectors, respectively. For the energy production sector, this was mainly because of the reduction (4.1%) in the bituminous coal consumption by public power generation facilities and the reduction (19.6%, 5,292 tons) in emissions caused by the reinforcement of environmental facilities for power generation facilities. In the case of the road sector, the main cause of such reduction was the decrease in emissions caused by the reduction in the number of old vehicles, which offset the impacts of the increase in vehicles registrations and VKT increased by 2.0% (124,000 units) and 0.8% (750 million km), respectively, compared to those of the previous year.
SOX emissions decreased by 6.5% (7,866 tons) compared to those of the previous year. This was mainly due to the emissions reductions in the energy sector (15.5%, 3,697 tons), the non-road sector (17.1%, 1,966 tons), and the everyday activities and others sector (29.7%, 2,000 tons). More specifically, for the energy sector, the main cause of such reduction was the decrease in emissions from public power generation facilities as it was for NOX. In the case of the non-road sector, the emissions reductions caused by the decrease in the number of cargo ships entering the ports (6.9%, 6,640 units) and the decrease in the sulfur content in fuel (B-C oil). For the everyday activities and others sector, such reductions were due to the emissions reductions (49.3%, 1,424 tons) caused by the reduction in the consumption of fuel oil for cooling and heating (9.4%, 174,000 kL) in commercial and public facilities.
VOCs emissions from the everyday activities and others sector decreased by 1.8% (6,417 tons) compared to those of the previous year. This was mainly due to the decrease in emissions (6.7%, 8,609 tons) caused by the reduction in the consumption of paint at coating facilities (6.5%, 17,719 kL). VOCs emissions from the non-road sector, on the other hand, increased by 23.6% (2,662 tons). This was due to the emissions increase (47.0%, 2,844 tons) caused by an increase in the number of registered leisure boat (47.2%, 785 units).