Review Stage 2: Synthesis and Assessment Country report
KEY SOURCE ANALYSIS FOR
CLRTAP
Party: GB Submission year: 2023
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 2021, 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 | 2021 | 1A3bi (14.3%) | 1A2gviii (12.7%) | 1A3dii (11.3%) | 1A1a (10.0%) | 1A3bii (9.3%) | 1A1c (7.1%) | 1A4bi (5.5%) | 1A3biii (4.1%) | 1A4ai (4.0%) | 1A2gvii (2.2%) | 80.6% | |||||
| NMVOC | 2021 | 2D3a (24.4%) | 2H2 (15.2%) | 2D3d (7.2%) | 3Da2a (6.1%) | 2D3i (4.0%) | 3B1a (3.6%) | 1B2ai (3.6%) | 3B1b (3.5%) | 1A4bi (3.2%) | 1B2b (2.6%) | 1B2c (2.5%) | 1B2av (2.4%) | 2D3g (2.2%) | 80.6% | ||
| SOx | 2021 | 1A4bi (24.6%) | 1A2gviii (17.1%) | 1A1b (14.3%) | 1A1a (8.1%) | 1B1b (6.0%) | 1A2a (4.9%) | 1A3dii (4.4%) | 1A2f (3.3%) | 82.8% | |||||||
| NH3 | 2021 | 3Da2a (22.4%) | 3Da1 (13.7%) | 3B1a (13.6%) | 3B1b (12.7%) | 3Da3 (7.3%) | 6A (6.6%) | 3Da2c (6.2%) | 82.4% | ||||||||
| PM2.5 | 2021 | 1A4bi (27.2%) | 1A2gviii (19.2%) | 1A3bvi (6.8%) | 5C2 (4.7%) | 2A5b (3.5%) | 1A3bvii (3.1%) | 2C1 (2.5%) | 5E (2.1%) | 1A2d (2.1%) | 1A3dii (2.1%) | 1A3bi (2.0%) | 1A2f (1.8%) | 2G (1.5%) | 1A1a (1.4%) | 2A6 (1.4%) | 81.3% |
| PM10 | 2021 | 2A5b (20.5%) | 1A4bi (16.1%) | 1A2gviii (11.4%) | 1A3bvi (7.2%) | 2A5a (5.2%) | 3Dc (4.7%) | 1A3bvii (3.3%) | 5C2 (2.9%) | 2C1 (2.5%) | 3B4gii (1.8%) | 3B4giv (1.6%) | 5E (1.3%) | 1A2d (1.2%) | 2A6 (1.2%) | 81.0% | |
| TSP | 2021 | 2A5b (38.9%) | 1A4bi (9.6%) | 1A2gviii (6.8%) | 2A5a (6.1%) | 1A3bvi (5.5%) | 1A3bvii (3.8%) | 3Dc (2.7%) | 2C1 (2.6%) | 3B4gi (2.3%) | 3B4giv (2.2%) | 80.4% | |||||
| BC | 2021 | 1A2gviii (26.3%) | 1A4bi (14.5%) | 5C2 (10.1%) | 1A3bvi (8.5%) | 1A3bi (6.1%) | 5E (4.5%) | 1A3dii (4.0%) | 1A2gvii (3.4%) | 1A3bii (2.8%) | 80.2% | ||||||
| CO | 2021 | 1A2gvii (22.6%) | 1A4bi (18.2%) | 1A3bi (9.8%) | 1A2a (7.1%) | 1A2gviii (6.2%) | 1A4bii (5.8%) | 2C1 (5.5%) | 1A1a (3.5%) | 1A3dii (3.4%) | 82.1% | ||||||
| Pb | 2021 | 2C1 (31.7%) | 1A3bvi (29.7%) | 1A3aii(i) (7.2%) | 1A2gviii (6.8%) | 2G (4.2%) | 2I (3.4%) | 83.1% | |||||||||
| Cd | 2021 | 2G (32.9%) | 1A2gviii (23.5%) | 2C1 (11.8%) | 1A4bi (10.4%) | 1A1a (4.2%) | 82.8% | ||||||||||
| Hg | 2021 | 1A1a (21.3%) | 2C1 (14.2%) | 5C1bv (11.3%) | 5A (8.9%) | 1A2gviii (8.5%) | 1A2f (8.4%) | 2C7c (6.7%) | 1A4bi (6.5%) | 85.9% | |||||||
| As | 2021 | 5C2 (63.4%) | 2C1 (20.3%) | 83.8% | |||||||||||||
| Cr | 2021 | 1A3bvi (29.7%) | 5C2 (20.4%) | 2G (14.6%) | 2C1 (10.5%) | 1A2gviii (5.3%) | 80.5% | ||||||||||
| Cu | 2021 | 1A3bvi (50.4%) | 2G (45.7%) | 96.1% | |||||||||||||
| Ni | 2021 | 1A4bi (32.8%) | 1A2gviii (16.1%) | 2G (14.0%) | 1A3dii (8.7%) | 2C1 (5.5%) | 1A2gvii (3.0%) | 80.1% | |||||||||
| Se | 2021 | 1A1a (19.1%) | 2G (16.3%) | 1A2f (15.8%) | 2A3 (14.6%) | 2C1 (9.4%) | 1A2gviii (4.2%) | 1A3bvi (3.1%) | 82.5% | ||||||||
| Zn | 2021 | 2G (28.5%) | 1A2gviii (22.6%) | 1A3bvi (21.1%) | 2C1 (15.0%) | 87.2% | |||||||||||
| DIOX | 2021 | 5C2 (23.4%) | 5E (17.9%) | 1A2gviii (16.9%) | 1A4bi (16.6%) | 2C1 (6.8%) | 81.6% | ||||||||||
| PAH | 2021 | 1A4bi (85.8%) | 85.8% | ||||||||||||||
| HCB | 2021 | 1A1a (77.9%) | 3Df (19.3%) | 97.3% | |||||||||||||
| PCB | 2021 | 2K (45.1%) | 5C2 (19.8%) | 2C1 (19.5%) | 84.4% | ||||||||||||
| Component | Year | Key categories (Sorted from high to low from left to right) | Total | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NOx | 2010 | 1A1a (19.6%) | 1A3biii (15.2%) | 1A3bi (14.0%) | 1A3dii (8.6%) | 1A2gviii (5.9%) | 1A1c (5.2%) | 1A3bii (4.9%) | 1A4bi (3.9%) | 1A4cii (3.0%) | 80.3% | |||||||||
| NMVOC | 2010 | 2D3a (19.5%) | 2H2 (9.9%) | 2D3d (9.2%) | 1A3bi (5.4%) | 1B2b (4.2%) | 2D3i (4.1%) | 1B2ai (3.9%) | 3Da2a (3.5%) | 3B1b (3.4%) | 1B2av (3.1%) | 1B2c (2.9%) | 3B1a (2.7%) | 1B1a (2.7%) | 1B2aiv (2.3%) | 1A4bi (2.2%) | 2B10a (2.2%) | 81.4% | ||
| SOx | 2010 | 1A1a (37.2%) | 1A1b (12.2%) | 1A2gviii (9.5%) | 1A4bi (7.0%) | 1A3dii (6.6%) | 1A2b (5.9%) | 1B1b (4.1%) | 82.5% | |||||||||||
| NH3 | 2010 | 3Da2a (23.5%) | 3Da1 (15.8%) | 3B1b (14.7%) | 3B1a (11.5%) | 3Da3 (7.3%) | 6A (5.1%) | 3B3 (4.5%) | 82.3% | |||||||||||
| PM2.5 | 2010 | 1A4bi (17.5%) | 1A2gviii (9.9%) | 1A3bvi (6.2%) | 1A3bi (6.2%) | 1A1a (4.6%) | 5C2 (4.0%) | 1A3dii (3.8%) | 1A3bii (3.6%) | 1A3biii (3.5%) | 1A2gvii (3.4%) | 2A5b (3.2%) | 1A3bvii (2.9%) | 1A4cii (2.8%) | 2C1 (2.6%) | 5E (2.2%) | 2G (2.1%) | 1A2c (1.8%) | 80.5% | |
| PM10 | 2010 | 2A5b (18.9%) | 1A4bi (10.4%) | 1A3bvi (6.7%) | 2A5a (6.1%) | 1A2gviii (6.0%) | 1A1a (4.1%) | 3Dc (4.0%) | 1A3bi (3.6%) | 1A3bvii (3.1%) | 2C1 (2.9%) | 5C2 (2.5%) | 1A3dii (2.3%) | 1A3bii (2.1%) | 1A3biii (2.0%) | 1A2gvii (2.0%) | 1A4cii (1.6%) | 2G (1.6%) | 3B4giv (1.4%) | 81.3% |
| TSP | 2010 | 2A5b (36.6%) | 2A5a (7.3%) | 1A4bi (6.4%) | 1A3bvi (5.2%) | 1A2gviii (3.7%) | 1A3bvii (3.6%) | 1A1a (3.1%) | 2C1 (3.0%) | 3Dc (2.4%) | 1A3bi (2.1%) | 3B4gi (2.0%) | 3B4giv (1.8%) | 3B4gii (1.5%) | 5C2 (1.5%) | 80.1% | ||||
| BC | 2010 | 1A3bi (18.6%) | 1A3bii (11.4%) | 1A2gviii (9.1%) | 1A3biii (9.0%) | 1A2gvii (7.9%) | 1A4cii (7.2%) | 5C2 (6.4%) | 1A4bi (6.2%) | 1A3bvi (5.6%) | 81.5% | |||||||||
| CO | 2010 | 1A3bi (32.6%) | 1A2gvii (14.1%) | 1A4bi (12.1%) | 1A2a (6.1%) | 1A1a (3.7%) | 1A4bii (3.6%) | 2C1 (3.4%) | 1A2gviii (2.5%) | 1A3bii (2.4%) | 80.3% | |||||||||
| Pb | 2010 | 1A3bvi (28.2%) | 2C1 (18.3%) | 1A3aii(i) (11.8%) | 1A2gviii (9.1%) | 2G (7.6%) | 1A4bi (3.6%) | 2C7c (3.2%) | 81.8% | |||||||||||
| Cd | 2010 | 2G (40.2%) | 2C1 (13.3%) | 1A2gviii (10.5%) | 1A4bi (5.7%) | 1A2b (4.1%) | 1A3bvi (3.6%) | 1A1a (3.2%) | 80.6% | |||||||||||
| Hg | 2010 | 1A1a (22.4%) | 5C1bv (12.8%) | 2B10a (12.3%) | 1A2gviii (7.8%) | 2C1 (5.7%) | 5A (5.5%) | 1A1b (4.5%) | 1A4bi (4.1%) | 2C7c (4.0%) | 1A2f (3.7%) | 82.7% | ||||||||
| As | 2010 | 5C2 (54.1%) | 2C1 (21.5%) | 1A2gviii (5.9%) | 81.5% | |||||||||||||||
| Cr | 2010 | 1A3bvi (30.6%) | 5C2 (20.8%) | 2G (15.5%) | 2C7c (5.1%) | 2C1 (4.7%) | 1A1a (4.5%) | 81.3% | ||||||||||||
| Cu | 2010 | 1A3bvi (49.0%) | 2G (45.5%) | 94.6% | ||||||||||||||||
| Ni | 2010 | 1A2gviii (31.9%) | 1A3dii (18.5%) | 2G (10.0%) | 1A1b (5.3%) | 1A4bi (5.2%) | 1A2c (3.6%) | 1A4ai (2.6%) | 1A1a (2.6%) | 2C1 (2.5%) | 82.1% | |||||||||
| Se | 2010 | 1A1a (38.0%) | 2A3 (28.8%) | 2G (8.2%) | 2C1 (5.9%) | 80.9% | ||||||||||||||
| Zn | 2010 | 1A2gviii (27.3%) | 2G (27.2%) | 1A3bvi (19.4%) | 2C1 (14.1%) | 88.0% | ||||||||||||||
| DIOX | 2010 | 2C1 (23.1%) | 5C2 (16.5%) | 5E (16.0%) | 1A4bi (13.0%) | 1A2gviii (8.4%) | 1A3bi (6.3%) | 83.4% | ||||||||||||
| PAH | 2010 | 1A4bi (85.8%) | 85.8% | |||||||||||||||||
| HCB | 2010 | 3Df (66.2%) | 1A1a (27.8%) | 94.0% | ||||||||||||||||
| PCB | 2010 | 2K (55.4%) | 2C1 (17.6%) | 5C2 (11.8%) | 84.8% | |||||||||||||||
| Component | Year | Key categories (Sorted from high to low from left to right) | Total | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NOx | 2005 | 1A1a (21.6%) | 1A3bi (17.2%) | 1A3biii (15.2%) | 1A3dii (7.6%) | 1A2gviii (5.0%) | 1A1c (4.2%) | 1A3bii (4.1%) | 1A2gvii (3.7%) | 1A4bi (3.0%) | 81.7% | |||||||||
| NMVOC | 2005 | 2D3a (13.0%) | 1A3bi (13.0%) | 2D3d (10.1%) | 1B2ai (7.1%) | 2H2 (6.8%) | 1B2av (4.0%) | 1B2b (3.8%) | 1A3bv (3.7%) | 2D3i (3.4%) | 2B10a (3.0%) | 3B1b (2.6%) | 1B2aiv (2.6%) | 3Da2a (2.5%) | 1B1a (2.5%) | 1A2gvii (1.9%) | 3B1a (1.9%) | 81.8% | ||
| SOx | 2005 | 1A1a (49.3%) | 1A1b (9.6%) | 1A3dii (9.1%) | 1A4bi (5.5%) | 1A2gviii (4.7%) | 1A2b (4.4%) | 82.5% | ||||||||||||
| NH3 | 2005 | 3Da2a (24.1%) | 3B1b (14.4%) | 3Da1 (13.3%) | 3B1a (10.1%) | 3Da3 (7.6%) | 1A3bi (6.5%) | 3B3 (5.2%) | 81.2% | |||||||||||
| PM2.5 | 2005 | 1A4bi (15.0%) | 1A3dii (7.8%) | 1A2gviii (5.9%) | 1A3bi (5.5%) | 1A2gvii (5.4%) | 1A3biii (5.3%) | 1A3bvi (5.2%) | 1A1a (5.0%) | 1A3bii (4.2%) | 1A4cii (3.5%) | 5C2 (3.2%) | 2A5b (2.9%) | 2C1 (2.7%) | 1A3bvii (2.4%) | 5E (2.2%) | 2G (2.1%) | 1A2c (1.6%) | 80.2% | |
| PM10 | 2005 | 2A5b (17.5%) | 1A4bi (9.1%) | 2A5a (6.9%) | 1A3bvi (5.8%) | 1A1a (4.9%) | 1A3dii (4.9%) | 1A2gviii (3.6%) | 1A3bi (3.2%) | 1A2gvii (3.2%) | 3Dc (3.2%) | 1A3biii (3.1%) | 2C1 (2.9%) | 1A3bvii (2.7%) | 1A3bii (2.5%) | 1A4cii (2.1%) | 5C2 (2.1%) | 2G (1.7%) | 2A6 (1.5%) | 81.1% |
| TSP | 2005 | 2A5b (34.9%) | 2A5a (8.5%) | 1A4bi (5.8%) | 1A3bvi (4.6%) | 1A1a (4.0%) | 1A3bvii (3.2%) | 2C1 (3.0%) | 1A3dii (2.9%) | 1A2gviii (2.2%) | 1A3bi (1.9%) | 1A2gvii (1.9%) | 3Dc (1.9%) | 1A3biii (1.9%) | 3B4gi (1.7%) | 1A3bii (1.5%) | 3B4giv (1.5%) | 81.4% | ||
| BC | 2005 | 1A3bi (14.3%) | 1A3biii (12.2%) | 1A2gvii (12.0%) | 1A3bii (11.8%) | 1A4cii (8.4%) | 1A2gviii (6.7%) | 1A3dii (5.6%) | 5C2 (4.9%) | 1A4bi (4.6%) | 80.4% | |||||||||
| CO | 2005 | 1A3bi (47.6%) | 1A2gvii (13.0%) | 1A4bi (7.0%) | 1A2a (6.8%) | 1A3bii (2.8%) | 2C1 (2.5%) | 1A1a (2.2%) | 81.8% | |||||||||||
| Pb | 2005 | 2C1 (21.1%) | 1A3aii(i) (18.0%) | 1A3bvi (17.9%) | 2G (7.8%) | 2B10a (7.0%) | 1A2gviii (5.9%) | 1A1a (5.1%) | 82.7% | |||||||||||
| Cd | 2005 | 2G (33.2%) | 2C1 (17.0%) | 1A1a (15.6%) | 1A2gviii (7.8%) | 1A4bi (5.0%) | 1A3bvi (3.0%) | 81.6% | ||||||||||||
| Hg | 2005 | 1A1a (30.5%) | 2B10a (15.0%) | 5C1bv (12.0%) | 2C1 (6.3%) | 2C7c (6.0%) | 5A (4.9%) | 1A4bi (4.1%) | 1A2f (3.9%) | 82.7% | ||||||||||
| As | 2005 | 5C2 (48.1%) | 2C1 (27.6%) | 1A2gviii (5.1%) | 80.7% | |||||||||||||||
| Cr | 2005 | 1A3bvi (22.8%) | 2B10a (16.5%) | 5C2 (15.1%) | 2G (11.5%) | 1A1a (7.7%) | 2C1 (6.5%) | 80.2% | ||||||||||||
| Cu | 2005 | 1A3bvi (48.5%) | 2G (44.9%) | 93.4% | ||||||||||||||||
| Ni | 2005 | 1A2gviii (23.4%) | 1A4bi (23.0%) | 1A3dii (16.2%) | 2G (6.8%) | 1A1b (5.4%) | 1A1a (3.5%) | 2C3 (2.3%) | 80.6% | |||||||||||
| Se | 2005 | 1A1a (44.2%) | 2A3 (33.3%) | 2C1 (5.7%) | 83.3% | |||||||||||||||
| Zn | 2005 | 1A2gviii (26.5%) | 2G (25.0%) | 2C1 (18.2%) | 1A3bvi (17.9%) | 87.6% | ||||||||||||||
| DIOX | 2005 | 5C2 (26.0%) | 5E (21.8%) | 2C1 (15.6%) | 1A4bi (9.9%) | 1A3bi (5.9%) | 1A1a (3.9%) | 83.1% | ||||||||||||
| PAH | 2005 | 1A4bi (75.0%) | 5C2 (11.1%) | 86.1% | ||||||||||||||||
| HCB | 2005 | 3Df (54.3%) | 2B10a (33.0%) | 87.3% | ||||||||||||||||
| PCB | 2005 | 2K (59.5%) | 2C1 (14.4%) | 5C2 (11.7%) | 85.6% | |||||||||||||||