Review Stage 2: Synthesis and Assessment Country report
KEY SOURCE ANALYSIS
Party: GB Submission year: 2022
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 2020, 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 | 2020 | 1A3bi (13.6%) | 1A2gviii (12.2%) | 1A3dii (10.9%) | 1A1a (10.5%) | 1A3bii (9.1%) | 1A1c (8.1%) | 1A3biii (4.7%) | 1A4bi (4.4%) | 1A4ai (3.8%) | 1A2gvii (3.3%) | 80.7% | ||||
| NMVOC | 2020 | 2D3a (23.1%) | 2H2 (14.6%) | 2D3d (8.9%) | 3Da2a (5.9%) | 2D3i (4.6%) | 3B1a (3.6%) | 3B1b (3.5%) | 1B2ai (3.3%) | 1B2c (3.2%) | 1A4bi (3.0%) | 1B2b (2.7%) | 1B2av (2.2%) | 2D3g (2.1%) | 80.6% | |
| SOx | 2020 | 1A4bi (31.7%) | 1A2gviii (13.4%) | 1A1b (12.6%) | 1A1a (8.8%) | 1A2a (6.7%) | 1B1b (5.1%) | 1A3dii (3.8%) | 82.1% | |||||||
| NH3 | 2020 | 3Da2a (22.2%) | 3B1a (14.2%) | 3Da1 (13.4%) | 3B1b (13.1%) | 3Da3 (7.5%) | 6A (6.6%) | 3Da2c (5.9%) | 82.7% | |||||||
| PM2.5 | 2020 | 1A4bi (24.8%) | 1A2gviii (22.5%) | 1A3bvi (6.4%) | 5C2 (4.9%) | 2A5b (3.1%) | 1A2gvii (3.1%) | 2C1 (2.9%) | 1A3bvii (2.9%) | 1A3dii (2.1%) | 1A3bi (2.0%) | 1A1a (1.9%) | 1A4cii (1.7%) | 5E (1.6%) | 2G (1.5%) | 81.3% |
| PM10 | 2020 | 2A5b (18.1%) | 1A4bi (14.8%) | 1A2gviii (13.5%) | 1A3bvi (6.9%) | 2A5a (6.5%) | 3Dc (4.8%) | 1A3bvii (3.1%) | 5C2 (3.1%) | 2C1 (2.9%) | 1A2gvii (1.8%) | 3B4gii (1.8%) | 3B4giv (1.6%) | 1A3dii (1.3%) | 80.2% | |
| TSP | 2020 | 2A5b (35.0%) | 1A4bi (9.1%) | 1A2gviii (8.2%) | 2A5a (7.7%) | 1A3bvi (5.3%) | 1A3bvii (3.6%) | 2C1 (3.2%) | 3Dc (2.8%) | 3B4gi (2.5%) | 3B4giv (2.3%) | 3B4gii (2.1%) | 81.9% | |||
| BC | 2020 | 1A2gviii (31.1%) | 1A4bi (11.6%) | 5C2 (10.5%) | 1A2gvii (9.7%) | 1A3bvi (8.1%) | 1A4cii (5.8%) | 1A3dii (4.0%) | 80.9% | |||||||
| CO | 2020 | 1A4bi (22.0%) | 1A2gvii (17.6%) | 1A3bi (8.7%) | 1A2a (8.2%) | 1A2gviii (7.2%) | 1A4bii (5.9%) | 2C1 (5.8%) | 1A1a (3.5%) | 1A3dii (3.3%) | 82.2% | |||||
| Pb | 2020 | 1A3bvi (36.4%) | 2C1 (19.1%) | 1A2gviii (9.2%) | 1A5b (6.0%) | 2C7c (5.1%) | 2G (4.8%) | 80.5% | ||||||||
| Cd | 2020 | 2G (34.5%) | 1A2gviii (32.1%) | 1A4bi (9.8%) | 2C1 (8.2%) | 84.6% | ||||||||||
| Hg | 2020 | 1A1a (21.2%) | 5C1bv (12.8%) | 5A (10.0%) | 1A2gviii (9.5%) | 2C7c (9.0%) | 2C1 (8.7%) | 1A2f (8.3%) | 1A4bi (5.5%) | 84.9% | ||||||
| As | 2020 | 5C2 (63.1%) | 2C1 (19.4%) | 82.6% | ||||||||||||
| Cr | 2020 | 1A3bvi (28.1%) | 5C2 (20.1%) | 2G (13.6%) | 2C1 (8.1%) | 1A1a (7.1%) | 1A2gviii (6.4%) | 83.5% | ||||||||
| Cu | 2020 | 1A3bvi (50.9%) | 2G (45.3%) | 96.2% | ||||||||||||
| Ni | 2020 | 1A4bi (59.9%) | 1A2gviii (10.0%) | 2G (8.7%) | 1A3dii (5.4%) | 83.9% | ||||||||||
| Se | 2020 | 1A1a (19.9%) | 2G (16.5%) | 2A3 (14.7%) | 1A4bi (12.3%) | 2C1 (9.2%) | 1A2f (4.7%) | 1A2gviii (4.6%) | 82.0% | |||||||
| Zn | 2020 | 2G (28.8%) | 1A2gviii (26.3%) | 1A3bvi (21.5%) | 2C1 (13.5%) | 90.1% | ||||||||||
| DIOX | 2020 | 1A4bi (26.8%) | 5C2 (18.8%) | 1A2gviii (14.9%) | 2C1 (13.7%) | 5E (12.5%) | 86.7% | |||||||||
| PAH | 2020 | 1A4bi (72.9%) | 5E (5.4%) | 5C2 (3.2%) | 81.5% | |||||||||||
| HCB | 2020 | 1A1a (67.4%) | 3Df (30.3%) | 97.7% | ||||||||||||
| PCB | 2020 | 2K (68.3%) | 5C2 (12.2%) | 80.5% | ||||||||||||
| Component | Year | Key categories (Sorted from high to low from left to right) | Total | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NOx | 2010 | 1A1a (19.5%) | 1A3biii (14.9%) | 1A3bi (13.8%) | 1A3dii (8.6%) | 1A2gviii (5.9%) | 1A1c (5.1%) | 1A2gvii (5.0%) | 1A3bii (4.9%) | 1A4bi (3.2%) | 81.0% | ||||||||
| NMVOC | 2010 | 2D3a (19.6%) | 2H2 (9.9%) | 2D3d (9.2%) | 1A3bi (5.4%) | 1B2b (4.2%) | 2D3i (4.1%) | 3Da2a (3.4%) | 3B1b (3.4%) | 1B2av (3.1%) | 1B2ai (3.0%) | 1B2c (2.9%) | 1B1a (2.7%) | 3B1a (2.7%) | 1A4bi (2.4%) | 1B2aiv (2.3%) | 2B10a (2.2%) | 80.6% | |
| SOx | 2010 | 1A1a (37.9%) | 1A1b (12.5%) | 1A4bi (8.7%) | 1A2gviii (7.2%) | 1A3dii (6.8%) | 1A2b (5.0%) | 1B1b (4.8%) | 82.9% | ||||||||||
| NH3 | 2010 | 3Da2a (23.1%) | 3Da1 (15.2%) | 3B1b (14.8%) | 3B1a (12.2%) | 3Da3 (7.4%) | 6A (5.1%) | 3B3 (4.5%) | 82.3% | ||||||||||
| PM2.5 | 2010 | 1A4bi (18.5%) | 1A2gviii (10.5%) | 1A2gvii (6.1%) | 1A3bvi (5.9%) | 1A3bi (5.8%) | 1A1a (4.3%) | 5C2 (3.8%) | 1A3dii (3.6%) | 1A3bii (3.4%) | 1A3biii (3.3%) | 2A5b (3.0%) | 1A4cii (2.9%) | 1A3bvii (2.7%) | 2C1 (2.5%) | 5E (2.0%) | 2G (2.0%) | 80.2% | |
| PM10 | 2010 | 2A5b (18.0%) | 1A4bi (11.2%) | 1A2gviii (6.5%) | 1A3bvi (6.5%) | 2A5a (5.9%) | 3Dc (3.9%) | 1A1a (3.9%) | 1A2gvii (3.6%) | 1A3bi (3.4%) | 1A3bvii (3.0%) | 2C1 (2.8%) | 5C2 (2.4%) | 1A3dii (2.2%) | 1A3bii (2.0%) | 1A3biii (1.9%) | 1A4cii (1.7%) | 2G (1.6%) | 80.7% |
| TSP | 2010 | 2A5b (35.5%) | 2A5a (7.2%) | 1A4bi (7.1%) | 1A3bvi (5.1%) | 1A2gviii (4.0%) | 1A3bvii (3.6%) | 1A1a (3.1%) | 2C1 (2.9%) | 3Dc (2.3%) | 1A2gvii (2.1%) | 1A3bi (2.0%) | 3B4gi (1.9%) | 3B4giv (1.8%) | 3B4gii (1.5%) | 80.1% | |||
| BC | 2010 | 1A3bi (14.7%) | 1A2gvii (14.2%) | 1A3bii (10.9%) | 1A2gviii (9.6%) | 1A3biii (8.7%) | 1A4cii (7.2%) | 1A4bi (6.0%) | 5C2 (6.0%) | 1A3bvi (5.5%) | 82.9% | ||||||||
| CO | 2010 | 1A3bi (32.9%) | 1A4bi (14.6%) | 1A2gvii (10.7%) | 1A2a (6.1%) | 1A1a (3.7%) | 1A4bii (3.6%) | 2C1 (3.4%) | 1A2gviii (3.0%) | 1A3bii (2.5%) | 80.5% | ||||||||
| Pb | 2010 | 1A3bvi (32.5%) | 2C1 (20.7%) | 1A2gviii (10.7%) | 2G (8.7%) | 2C7c (3.7%) | 2B10a (3.5%) | 2I (3.4%) | 83.1% | ||||||||||
| Cd | 2010 | 2G (39.9%) | 1A2gviii (14.2%) | 2C1 (13.2%) | 1A4bi (5.7%) | 1A2b (4.0%) | 1A3bvi (3.6%) | 80.5% | |||||||||||
| Hg | 2010 | 1A1a (22.7%) | 5C1bv (12.9%) | 2B10a (12.4%) | 1A2gviii (7.7%) | 2C1 (5.7%) | 5A (5.6%) | 1A1b (4.6%) | 2C7c (4.2%) | 1A2f (3.8%) | 1A4bi (3.0%) | 82.5% | |||||||
| As | 2010 | 5C2 (53.0%) | 2C1 (21.1%) | 1A2gviii (5.5%) | 1A1a (4.7%) | 84.3% | |||||||||||||
| Cr | 2010 | 1A3bvi (30.1%) | 5C2 (20.2%) | 2G (15.1%) | 2C7c (5.0%) | 2C1 (4.6%) | 1A4bi (4.5%) | 1A1a (4.4%) | 83.9% | ||||||||||
| Cu | 2010 | 1A3bvi (49.2%) | 2G (45.4%) | 94.7% | |||||||||||||||
| Ni | 2010 | 1A4bi (38.6%) | 1A2gviii (14.1%) | 1A3dii (14.0%) | 2G (7.6%) | 1A1b (4.0%) | 1A2c (2.7%) | 81.0% | |||||||||||
| Se | 2010 | 1A1a (35.9%) | 2A3 (27.5%) | 2G (7.9%) | 1A4bi (6.1%) | 2C1 (5.6%) | 83.0% | ||||||||||||
| Zn | 2010 | 1A2gviii (28.5%) | 2G (27.4%) | 1A3bvi (19.7%) | 2C1 (14.1%) | 89.6% | |||||||||||||
| DIOX | 2010 | 1A4bi (21.4%) | 2C1 (20.9%) | 5C2 (14.9%) | 5E (14.5%) | 1A2gviii (8.3%) | 80.0% | ||||||||||||
| PAH | 2010 | 1A4bi (66.1%) | 5E (8.6%) | 1B1b (3.4%) | 5C2 (3.1%) | 81.2% | |||||||||||||
| HCB | 2010 | 3Df (66.1%) | 1A1a (28.0%) | 94.1% | |||||||||||||||
| PCB | 2010 | 2K (66.5%) | 2C1 (13.3%) | 5C2 (8.9%) | 88.7% | ||||||||||||||
| Component | Year | Key categories (Sorted from high to low from left to right) | Total | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NOx | 2005 | 1A1a (21.3%) | 1A3bi (17.0%) | 1A3biii (14.8%) | 1A3dii (7.5%) | 1A2gvii (5.4%) | 1A2gviii (5.3%) | 1A1c (4.2%) | 1A3bii (4.1%) | 1A4cii (3.0%) | 82.6% | ||||||||
| NMVOC | 2005 | 1A3bi (13.0%) | 2D3a (12.9%) | 2D3d (10.0%) | 2H2 (6.8%) | 1B2ai (6.5%) | 1B2av (4.0%) | 1B2b (3.9%) | 1A3bv (3.8%) | 2D3i (3.4%) | 2B10a (3.0%) | 3B1b (2.6%) | 1B2aiv (2.6%) | 1B1a (2.5%) | 3Da2a (2.5%) | 1A2gvii (2.0%) | 3B1a (1.9%) | 81.4% | |
| SOx | 2005 | 1A1a (49.2%) | 1A1b (9.5%) | 1A3dii (9.0%) | 1A4bi (6.8%) | 1A2gviii (4.6%) | 1A2b (4.0%) | 83.1% | |||||||||||
| NH3 | 2005 | 3Da2a (23.6%) | 3B1b (14.4%) | 3Da1 (13.2%) | 3B1a (10.7%) | 3Da3 (7.6%) | 1A3bi (6.6%) | 3B3 (5.2%) | 81.3% | ||||||||||
| PM2.5 | 2005 | 1A4bi (15.2%) | 1A2gvii (7.7%) | 1A3dii (7.4%) | 1A2gviii (6.7%) | 1A3bi (5.1%) | 1A3bvi (5.0%) | 1A3biii (5.0%) | 1A1a (4.8%) | 1A4cii (4.7%) | 1A3bii (4.1%) | 5C2 (3.1%) | 2A5b (2.8%) | 2C1 (2.6%) | 1A3bvii (2.3%) | 5E (2.1%) | 2G (2.0%) | 80.5% | |
| PM10 | 2005 | 2A5b (16.9%) | 1A4bi (9.4%) | 2A5a (6.8%) | 1A3bvi (5.6%) | 1A1a (4.8%) | 1A3dii (4.7%) | 1A2gvii (4.7%) | 1A2gviii (4.2%) | 3Dc (3.1%) | 1A3bi (3.1%) | 1A3biii (3.0%) | 1A4cii (2.8%) | 2C1 (2.8%) | 1A3bvii (2.6%) | 1A3bii (2.5%) | 5C2 (2.0%) | 2G (1.7%) | 80.8% |
| TSP | 2005 | 2A5b (34.1%) | 2A5a (8.3%) | 1A4bi (6.0%) | 1A3bvi (4.5%) | 1A1a (3.9%) | 1A3bvii (3.2%) | 2C1 (3.0%) | 1A3dii (2.9%) | 1A2gvii (2.8%) | 1A2gviii (2.6%) | 3Dc (1.9%) | 1A3bi (1.9%) | 1A3biii (1.8%) | 1A4cii (1.7%) | 3B4gi (1.7%) | 80.3% | ||
| BC | 2005 | 1A2gvii (16.3%) | 1A3bi (12.2%) | 1A3bii (11.4%) | 1A3biii (11.3%) | 1A4cii (10.7%) | 1A2gviii (7.4%) | 1A3dii (5.1%) | 5C2 (4.4%) | 1A4bi (4.4%) | 83.2% | ||||||||
| CO | 2005 | 1A3bi (50.6%) | 1A4bi (8.9%) | 1A2a (7.2%) | 1A2gvii (6.8%) | 1A3bii (2.8%) | 2C1 (2.6%) | 1A3biv (2.4%) | 81.3% | ||||||||||
| Pb | 2005 | 2C1 (25.7%) | 1A3bvi (21.9%) | 2G (9.5%) | 2B10a (8.5%) | 1A2gviii (7.3%) | 1A1a (6.1%) | 2C7c (4.7%) | 83.8% | ||||||||||
| Cd | 2005 | 2G (33.2%) | 2C1 (17.0%) | 1A1a (15.5%) | 1A2gviii (9.6%) | 1A4bi (4.9%) | 80.2% | ||||||||||||
| Hg | 2005 | 1A1a (30.8%) | 2B10a (15.1%) | 5C1bv (12.1%) | 2C7c (7.0%) | 2C1 (6.3%) | 5A (4.9%) | 1A2gviii (3.9%) | 80.1% | ||||||||||
| As | 2005 | 5C2 (47.3%) | 2C1 (27.1%) | 1A2gviii (5.0%) | 1A4bi (3.4%) | 82.9% | |||||||||||||
| Cr | 2005 | 1A3bvi (22.4%) | 2B10a (16.2%) | 5C2 (14.8%) | 2G (11.3%) | 1A1a (7.5%) | 2C1 (6.3%) | 2C7c (5.9%) | 84.5% | ||||||||||
| Cu | 2005 | 1A3bvi (48.6%) | 2G (44.8%) | 93.4% | |||||||||||||||
| Ni | 2005 | 1A4bi (32.2%) | 1A2gviii (20.9%) | 1A3dii (14.3%) | 2G (6.0%) | 1A1b (4.8%) | 1A1a (3.1%) | 81.3% | |||||||||||
| Se | 2005 | 1A1a (43.2%) | 2A3 (32.7%) | 2C1 (5.6%) | 81.4% | ||||||||||||||
| Zn | 2005 | 1A2gviii (27.2%) | 2G (25.2%) | 2C1 (18.2%) | 1A3bvi (18.0%) | 88.6% | |||||||||||||
| DIOX | 2005 | 5C2 (24.0%) | 5E (19.6%) | 1A4bi (17.7%) | 2C1 (14.0%) | 1A3bi (5.3%) | 80.6% | ||||||||||||
| PAH | 2005 | 1A4bi (48.8%) | 5C2 (23.0%) | 5E (8.2%) | 1A3bi (3.4%) | 83.3% | |||||||||||||
| HCB | 2005 | 3Df (54.3%) | 2B10a (33.0%) | 87.3% | |||||||||||||||
| PCB | 2005 | 2K (63.6%) | 2C1 (12.4%) | 5C2 (11.7%) | 87.7% | ||||||||||||||