Review Stage 2: Synthesis and Assessment Country report
KEY SOURCE ANALYSIS FOR
CLRTAP
Party: GB Submission year: 2021
Key categories analysis is increasingly important in order to prioritize emission sources and identify where the implementation of improvements is most effective. We have assessed the most important sources (the sources making up 80% of the national total) for your country, based on your latest submission. The key sources for the 2019, 2010 and 2005 emissions, including the corresponding percentages, are listed below. |
| Component | Year | Key categories (Sorted from high to low from left to right) | Total | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NOx | 2019 | 1A3bi (17.5%) | 1A3bii (11.9%) | 1A3dii (10.6%) | 1A2gviii (10.0%) | 1A1a (9.0%) | 1A1c (6.9%) | 1A4bi (4.1%) | 1A3biii (3.7%) | 1A2gvii (3.6%) | 1A4ai (3.4%) | 80.7% | ||||
| NMVOC | 2019 | 2D3a (19.9%) | 2H2 (13.8%) | 2D3d (9.1%) | 1A4bi (5.9%) | 3Da2a (3.9%) | 2D3i (3.9%) | 1B2c (3.9%) | 1B2ai (3.6%) | 3B1a (3.5%) | 3B1b (3.5%) | 1B2av (2.7%) | 1B2b (2.7%) | 1B2aiv (2.3%) | 2D3g (2.1%) | 80.7% |
| SOx | 2019 | 1A4bi (27.6%) | 1A1b (14.0%) | 1A2gviii (11.7%) | 1A1a (7.2%) | 1A3dii (7.0%) | 1A2a (5.6%) | 2H1 (4.8%) | 1B1b (3.7%) | 81.7% | ||||||
| NH3 | 2019 | 3Da2a (22.3%) | 3Da1 (15.0%) | 3B1a (13.3%) | 3B1b (12.7%) | 3Da3 (7.2%) | 3Da2c (5.2%) | 6A (5.1%) | 80.9% | |||||||
| PM2.5 | 2019 | 1A4bi (43.3%) | 1A2gviii (13.2%) | 1A3bvi (5.4%) | 1A2gvii (2.9%) | 1A3bvii (2.8%) | 1A3bi (2.5%) | 2A5b (2.3%) | 1A3dii (2.2%) | 2H1 (2.1%) | 2C1 (1.9%) | 5E (1.7%) | 80.3% | |||
| PM10 | 2019 | 1A4bi (28.3%) | 2A5b (14.9%) | 1A2gviii (8.7%) | 1A3bvi (6.3%) | 2A5a (5.7%) | 3Dc (4.0%) | 1A3bvii (3.3%) | 2C1 (2.2%) | 1A2gvii (1.9%) | 2H1 (1.8%) | 1A3bi (1.6%) | 1A3dii (1.5%) | 3B4gii (1.4%) | 81.4% | |
| TSP | 2019 | 2A5b (29.9%) | 1A4bi (18.0%) | 2A5a (7.0%) | 1A2gviii (5.5%) | 1A3bvi (5.1%) | 3Dc (4.8%) | 1A3bvii (4.0%) | 2C1 (2.4%) | 3B4gi (2.1%) | 3B4giv (2.1%) | 80.9% | ||||
| BC | 2019 | 1A4bi (24.4%) | 1A2gviii (21.1%) | 1A2gvii (11.0%) | 1A3bvi (8.6%) | 1A4cii (5.8%) | 1A3dii (4.6%) | 1A3bi (4.2%) | 5E (4.2%) | 83.9% | ||||||
| CO | 2019 | 1A4bi (28.8%) | 1A2gvii (15.8%) | 1A3bi (13.0%) | 1A2a (6.3%) | 1A2gviii (5.3%) | 1A4bii (4.6%) | 2C1 (4.5%) | 1A3dii (3.0%) | 81.2% | ||||||
| Pb | 2019 | 1A3bvi (36.0%) | 2C1 (19.4%) | 1A2gviii (9.7%) | 2G (7.2%) | 2C7c (6.5%) | 1A4bi (5.1%) | 83.9% | ||||||||
| Cd | 2019 | 2G (34.4%) | 1A2gviii (23.0%) | 1A4bi (21.3%) | 2C1 (7.6%) | 86.4% | ||||||||||
| Hg | 2019 | 1A1a (16.0%) | 5C1bv (15.3%) | 2C1 (13.0%) | 2C7c (10.0%) | 5A (8.5%) | 1A2gviii (8.4%) | 1A2f (6.0%) | 1A4bi (5.5%) | 82.6% | ||||||
| As | 2019 | 5C2 (61.4%) | 2C1 (19.0%) | 80.4% | ||||||||||||
| Cr | 2019 | 1A3bvi (27.3%) | 5C2 (19.3%) | 2G (16.6%) | 1A4bi (7.9%) | 2C1 (7.1%) | 1A2gviii (5.5%) | 83.8% | ||||||||
| Cu | 2019 | 2G (51.0%) | 1A3bvi (45.5%) | 96.5% | ||||||||||||
| Ni | 2019 | 1A4bi (56.0%) | 2G (10.1%) | 1A2gviii (9.6%) | 1A3dii (5.7%) | 81.4% | ||||||||||
| Se | 2019 | 2G (19.4%) | 1A1a (18.4%) | 2A3 (14.4%) | 1A4bi (11.8%) | 2C1 (8.7%) | 1A2gviii (4.1%) | 1A2f (3.9%) | 80.8% | |||||||
| Zn | 2019 | 2G (30.5%) | 1A2gviii (23.4%) | 1A3bvi (19.5%) | 2C1 (12.6%) | 86.0% | ||||||||||
| DIOX | 2019 | 1A4bi (36.9%) | 5E (12.3%) | 2C1 (12.3%) | 1A2gviii (11.5%) | 5C2 (7.9%) | 80.9% | |||||||||
| PAH | 2019 | 1A4bi (86.4%) | 86.4% | |||||||||||||
| HCB | 2019 | 1A1a (65.8%) | 3Df (30.9%) | 96.7% | ||||||||||||
| PCB | 2019 | 2K (55.8%) | 2C1 (19.1%) | 5E (13.3%) | 88.1% | |||||||||||
| Component | Year | Key categories (Sorted from high to low from left to right) | Total | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NOx | 2010 | 1A1a (20.0%) | 1A3bi (14.1%) | 1A3biii (12.6%) | 1A3dii (8.8%) | 1A2gviii (6.0%) | 1A3bii (5.2%) | 1A2gvii (5.2%) | 1A1c (4.9%) | 1A4bi (3.3%) | 80.1% | |||||||
| NMVOC | 2010 | 2D3a (17.0%) | 2H2 (10.3%) | 2D3d (9.6%) | 1A4bi (4.9%) | 1A3bi (4.7%) | 2D3i (4.1%) | 1B2b (4.1%) | 3B1b (3.6%) | 1B2av (3.2%) | 1B2ai (3.1%) | 1B2c (3.0%) | 3B1a (2.9%) | 1B1a (2.8%) | 3Da2a (2.7%) | 1B2aiv (2.4%) | 2B10a (2.3%) | 80.6% |
| SOx | 2010 | 1A1a (37.5%) | 1A1b (12.3%) | 1A4bi (8.7%) | 1A2gviii (7.1%) | 1A3dii (6.7%) | 1A2b (5.0%) | 1B1b (4.7%) | 82.0% | |||||||||
| NH3 | 2010 | 3Da2a (23.5%) | 3B1b (14.8%) | 3Da1 (14.3%) | 3B1a (12.4%) | 3Da3 (7.3%) | 6A (5.2%) | 3B3 (4.8%) | 82.2% | |||||||||
| PM2.5 | 2010 | 1A4bi (36.1%) | 1A2gviii (8.4%) | 1A2gvii (4.9%) | 1A3bi (4.7%) | 1A3bvi (4.3%) | 1A3bii (3.4%) | 1A1a (3.4%) | 1A3dii (2.9%) | 2A5b (2.4%) | 1A4cii (2.3%) | 1A3bvii (2.2%) | 2H1 (2.1%) | 2C1 (2.0%) | 1A3biii (2.0%) | 81.1% | ||
| PM10 | 2010 | 1A4bi (23.9%) | 2A5b (15.3%) | 1A2gviii (5.7%) | 2A5a (5.2%) | 1A3bvi (5.0%) | 3Dc (3.4%) | 1A1a (3.4%) | 1A2gvii (3.2%) | 1A3bi (3.0%) | 1A3bvii (2.6%) | 2C1 (2.4%) | 1A3bii (2.2%) | 1A3dii (1.9%) | 2H1 (1.8%) | 1A4cii (1.5%) | 80.6% | |
| TSP | 2010 | 2A5b (31.1%) | 1A4bi (15.5%) | 2A5a (6.5%) | 3Dc (4.1%) | 1A3bvi (4.1%) | 1A2gviii (3.6%) | 1A3bvii (3.2%) | 1A1a (2.8%) | 2C1 (2.6%) | 1A2gvii (1.9%) | 1A3bi (1.8%) | 3B4gi (1.8%) | 3B4giv (1.6%) | 80.7% | |||
| BC | 2010 | 1A3bi (14.1%) | 1A4bi (14.0%) | 1A2gvii (13.6%) | 1A3bii (13.0%) | 1A2gviii (9.2%) | 1A4cii (6.9%) | 1A3biii (6.4%) | 1A3bvi (4.9%) | 82.1% | ||||||||
| CO | 2010 | 1A3bi (30.8%) | 1A4bi (20.4%) | 1A2gvii (9.9%) | 1A2a (5.7%) | 1A1a (3.4%) | 1A4bii (3.3%) | 2C1 (3.2%) | 1A2gviii (2.7%) | 1A3bii (2.5%) | 81.9% | |||||||
| Pb | 2010 | 1A3bvi (28.7%) | 2C1 (22.0%) | 1A2gviii (11.3%) | 2G (9.3%) | 1A4bi (4.5%) | 2B10a (3.7%) | 2I (3.6%) | 83.1% | |||||||||
| Cd | 2010 | 2G (36.3%) | 1A4bi (15.0%) | 1A2gviii (13.0%) | 2C1 (12.0%) | 1A2b (3.7%) | 1A1a (2.8%) | 82.8% | ||||||||||
| Hg | 2010 | 1A1a (22.8%) | 5C1bv (12.9%) | 2B10a (12.4%) | 1A2gviii (7.7%) | 2C1 (5.7%) | 5A (5.6%) | 1A1b (4.6%) | 1A2f (3.8%) | 2C7c (3.8%) | 1A4bi (3.3%) | 82.6% | ||||||
| As | 2010 | 5C2 (53.4%) | 2C1 (21.3%) | 1A2gviii (5.6%) | 80.3% | |||||||||||||
| Cr | 2010 | 1A3bvi (26.0%) | 5C2 (21.0%) | 2G (15.7%) | 1A4bi (6.8%) | 2C7c (4.8%) | 2C1 (4.8%) | 1A1a (4.6%) | 83.7% | |||||||||
| Cu | 2010 | 2G (49.9%) | 1A3bvi (45.0%) | 94.9% | ||||||||||||||
| Ni | 2010 | 1A4bi (38.8%) | 1A2gviii (14.1%) | 1A3dii (14.0%) | 2G (7.6%) | 1A1b (4.0%) | 1A2c (2.7%) | 81.2% | ||||||||||
| Se | 2010 | 1A1a (36.1%) | 2A3 (27.1%) | 2G (7.9%) | 1A4bi (6.2%) | 2C1 (5.7%) | 83.1% | |||||||||||
| Zn | 2010 | 1A2gviii (28.2%) | 2G (27.1%) | 1A3bvi (17.3%) | 2C1 (14.0%) | 86.7% | ||||||||||||
| DIOX | 2010 | 1A4bi (30.6%) | 2C1 (18.5%) | 5E (12.8%) | 1A2gviii (7.4%) | 5C2 (6.9%) | 1A3bi (4.9%) | 81.1% | ||||||||||
| PAH | 2010 | 1A4bi (85.0%) | 85.0% | |||||||||||||||
| HCB | 2010 | 3Df (65.8%) | 1A1a (27.9%) | 93.6% | ||||||||||||||
| PCB | 2010 | 2K (59.4%) | 2C1 (17.8%) | 5E (9.9%) | 87.1% | |||||||||||||
| Component | Year | Key categories (Sorted from high to low from left to right) | Total | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NOx | 2005 | 1A1a (21.8%) | 1A3bi (17.0%) | 1A3biii (12.9%) | 1A3dii (7.7%) | 1A2gvii (5.5%) | 1A2gviii (5.4%) | 1A3bii (4.3%) | 1A1c (4.2%) | 1A4cii (3.1%) | 81.9% | ||||||||
| NMVOC | 2005 | 2D3a (12.0%) | 1A3bi (11.1%) | 2D3d (10.6%) | 2H2 (7.2%) | 1B2ai (6.9%) | 1B2av (4.2%) | 1B2b (3.8%) | 1A3bv (3.7%) | 2D3i (3.5%) | 2B10a (3.2%) | 3B1b (2.8%) | 1B2aiv (2.7%) | 1B1a (2.6%) | 1A4bi (2.4%) | 1A2gvii (2.1%) | 3B1a (2.0%) | 80.8% | |
| SOx | 2005 | 1A1a (48.8%) | 1A1b (9.5%) | 1A3dii (9.0%) | 1A4bi (6.7%) | 1A2gviii (4.6%) | 1A2b (3.9%) | 82.5% | |||||||||||
| NH3 | 2005 | 3Da2a (23.7%) | 3B1b (14.6%) | 3Da1 (12.1%) | 3B1a (11.1%) | 3Da3 (7.6%) | 1A3bi (6.1%) | 3B3 (5.7%) | 81.0% | ||||||||||
| PM2.5 | 2005 | 1A4bi (21.9%) | 1A2gvii (7.2%) | 1A3dii (7.0%) | 1A2gviii (6.2%) | 1A3bi (5.1%) | 1A3bii (4.7%) | 1A1a (4.5%) | 1A4cii (4.4%) | 1A3bvi (4.2%) | 1A3biii (3.6%) | 2A5b (2.6%) | 2C1 (2.4%) | 1A3bvii (2.2%) | 2H1 (2.0%) | 5E (2.0%) | 80.0% | ||
| PM10 | 2005 | 2A5b (16.0%) | 1A4bi (13.9%) | 2A5a (6.5%) | 1A3bvi (4.8%) | 1A1a (4.6%) | 1A3dii (4.6%) | 1A2gvii (4.5%) | 1A2gviii (4.0%) | 1A3bi (3.2%) | 3Dc (3.0%) | 1A3bii (2.9%) | 1A4cii (2.7%) | 2C1 (2.7%) | 1A3bvii (2.5%) | 1A3biii (2.2%) | 2H1 (1.7%) | 2G (1.6%) | 81.5% |
| TSP | 2005 | 2A5b (32.1%) | 1A4bi (8.9%) | 2A5a (8.0%) | 1A3bvi (3.9%) | 1A1a (3.8%) | 3Dc (3.6%) | 1A3bvii (3.1%) | 2C1 (2.9%) | 1A3dii (2.8%) | 1A2gvii (2.7%) | 1A2gviii (2.5%) | 1A3bi (1.9%) | 1A3bii (1.8%) | 1A4cii (1.7%) | 3B4gi (1.6%) | 81.1% | ||
| BC | 2005 | 1A2gvii (16.4%) | 1A3bii (13.8%) | 1A3bi (13.1%) | 1A4cii (10.7%) | 1A3biii (8.9%) | 1A2gviii (7.4%) | 1A4bi (6.7%) | 1A3dii (5.2%) | 82.2% | |||||||||
| CO | 2005 | 1A3bi (48.4%) | 1A4bi (10.5%) | 1A2a (7.2%) | 1A2gvii (6.8%) | 1A3bii (3.2%) | 1A3biv (2.6%) | 2C1 (2.6%) | 81.4% | ||||||||||
| Pb | 2005 | 2C1 (27.1%) | 1A3bvi (19.3%) | 2G (10.0%) | 2B10a (9.0%) | 1A2gviii (7.7%) | 1A1a (6.5%) | 2C7c (4.8%) | 84.3% | ||||||||||
| Cd | 2005 | 2G (32.6%) | 2C1 (16.7%) | 1A1a (15.2%) | 1A2gviii (9.2%) | 1A4bi (7.9%) | 81.5% | ||||||||||||
| Hg | 2005 | 1A1a (30.9%) | 2B10a (15.1%) | 5C1bv (12.1%) | 2C7c (6.9%) | 2C1 (6.4%) | 5A (4.9%) | 1A2gviii (3.9%) | 80.2% | ||||||||||
| As | 2005 | 5C2 (47.6%) | 2C1 (27.3%) | 1A2gviii (5.1%) | 1A4bi (3.4%) | 83.4% | |||||||||||||
| Cr | 2005 | 1A3bvi (19.4%) | 2B10a (16.8%) | 5C2 (15.4%) | 2G (11.7%) | 1A1a (7.9%) | 2C1 (6.6%) | 2C7c (6.1%) | 83.8% | ||||||||||
| Cu | 2005 | 2G (49.2%) | 1A3bvi (44.5%) | 93.7% | |||||||||||||||
| Ni | 2005 | 1A4bi (32.3%) | 1A2gviii (20.9%) | 1A3dii (14.3%) | 2G (6.0%) | 1A1b (4.8%) | 1A1a (3.1%) | 81.5% | |||||||||||
| Se | 2005 | 1A1a (43.4%) | 2A3 (32.4%) | 2C1 (5.6%) | 81.4% | ||||||||||||||
| Zn | 2005 | 1A2gviii (27.5%) | 2G (25.5%) | 2C1 (18.4%) | 1A3bvi (16.2%) | 87.6% | |||||||||||||
| DIOX | 2005 | 1A4bi (21.1%) | 5E (19.1%) | 5C2 (16.1%) | 2C1 (13.7%) | 1A3bi (4.9%) | 5C1bv (4.1%) | 1A1a (4.0%) | 83.0% | ||||||||||
| PAH | 2005 | 1A4bi (61.8%) | 5C2 (16.8%) | 5E (6.3%) | 84.8% | ||||||||||||||
| HCB | 2005 | 3Df (54.3%) | 2B10a (32.9%) | 87.2% | |||||||||||||||
| PCB | 2005 | 2K (59.3%) | 2C1 (15.5%) | 5E (10.0%) | 84.8% | ||||||||||||||