Table 1 The characteristics of temperature and environmental factors between 2000–2019 by continents and SDI
Variables | Temperature (℃) | PM (ug/m³) | NO2 (ppb) | O3 (ppb) |
|---|---|---|---|---|
Global | 19.11 (8.21) | 28.19 (17.03) | 5.37 (3.60) | 40.43 (9.81) |
Continents | ||||
Africa | 24.33 (3.30) | 36.51 (17.69) | 2.74 (1.70) | 38.13 (7.69) |
Asia | 18.60 (8.39) | 35.54 (18.37) | 7.16 (4.14) | 48.71 (9.72) |
Europe | 8.88 (4.14) | 16.74 (6.97) | 7.75 (2.23) | 42.69 (5.13) |
North America | 22.69 (7.62) | 20.20 (5.42) | 4.88 (3.41) | 36.12 (6.68) |
Oceania | 23.14 (5.09) | 11.87 (3.15) | 1.63 (2.14) | 24.01 (6.54) |
South America | 20.86 (5.12) | 23.91 (13.06) | 6.34 (2.17) | 31.39 (4.58) |
SDI | ||||
Low | 24.17 (4.17) | 38.24 (17.98) | 2.56 (1.31) | 38.20 (9.54) |
Low-middle | 21.09 (7.27) | 28.96 (14.22) | 4.48 (2.55) | 39.80 (10.53) |
Middle | 19.46 (6.81) | 24.26 (11.31) | 5.67 (3.01) | 40.09 (9.94) |
High-middle | 15.13 (8.14) | 23.90 (16.55) | 8.11 (3.66) | 43.52 (9.38) |
High | 8.99 (7.04) | 14.66 (12.17) | 9.05 (3.30) | 42.46 (7.57) |