“…Next section presents the methods of inquiry for this purpose. (Amaya and Samuel, 2022) 48.75% reduction (Phuong Ngoc et al, 2022) 20.40% reduction (Wang et al, 2021) 8.8% reduction (Rahman et al, 2021) 30.35% reduction (Mahato et al, 2020) 63% reduction (Navinya et al, 2020) 19.28 -25.53% reduction in USA and China (Shakoor et al, 2020) 13% 66% reduction (García-Dalmau et al, 2022) 63.98% reduction (Phuong Ngoc et al, 2022) 19.1 ± 9.4% reduction (Wu et al, 2022) 24-32 % reduction (Dang and Trinh, 2022) 69.2% reduction (Saini et al, 2022) 58.66% reduction (Habeebullah et al, 2022) 37.80% reduction (Wang et al, 2021) 20.4% reduction (Rahman et al, 2021) 40% reduction (Islam et al, 2021) 38.3% reduction (Jephcote et al, 2021) 37.13-55.54% reduction (Munir et al, 2021) 80.18% reduction (Nigam et al, 2021) 52.68% reduction (Mahato et al, 2020) 87% reduction (Navinya et al, 2020) 36.7 -38.98% reduction in USA and China (Shakoor et al, 2020) 10-40% reduction (Siciliano et (Amaya and Samuel, 2022) 19-39% reduction for Delhi and Mumbai (Kumari and Toshniwal, 2022) 45.76% reduction (Phuong Ngoc et al, 2022) 64.3% reduction (Saini et al, 2022) 17.5% reduction (Rahman et al, 2021) 43% reduction (Islam et al, 2021) 3.81% increase in the USA -18.36% reduction in China (Shakoor et al, 2020) (Amaya and Samuel, 2022) 27% increase (García-Dalmau et al, 2022) 26.54% increase (Phuong Ngoc et al, 2022) 68.67% increase (Habeebullah et al, 2022) 22-28% increase (Sbai et al, 2022) 9....…”