## 3 Results and Discussion
### Analyzing of Recorded Data
It is also clear from Table 1, which shows the concentrations of carbon monoxide gas in different environments, that the largest arithmetic average was equal to 15.7 ppm inside a greenhouse planted with bell peppers (F17) and that the lowest value was 7.5 ppm in a public garden (F3); it is known that the concentration of carbon monoxide gas within unhealthy limits has the values of 9-15 ppm. The values of CO varied during the measurement times; this phenomenon was also observed in a study by [PERSON] et al. [50], in which they found that the concentration of carbon monoxide varied with the measurement time. In addition, the arithmetic average of the dust concentration in the air was determined for different agricultural settings; the largest arithmetic average was equal to 263 ug/m\({}^{3}\) in a palm farm (F11), and the lowest value was 162 ug/m\({}^{3}\) in a greenhouse planted with eggplant (F14). However, some selected areas in this study were located at a level of high pollution based on dust concentration in the air, which was in the range of 150-250 ug/m\({}^{3}\) (micrograms per cubic meter of air). In a study by [PERSON] [14], using the GP2Y1010 AU0F sensor and an Arduino board to determine the dust concentration on a poultry farm, they found that the dust concentration value was 74.69 ug/m\({}^{3}\), and it varied over time, as the dust concentration value in the fourth week of rearing reached about 242.55 ug/m\({}^{3}\). \begin{table}
\begin{tabular}{c c c c c c c c c} \hline \hline \multirow{2}{*}{**Site Symbol**} & \multicolumn{2}{c}{**Coefficient of Variation (\%)**} & \multicolumn{2}{c}{**Maximum**} & \multicolumn{2}{c}{**Minimum**} & \multicolumn{2}{c}{**Standard Deviation**} \\ \cline{2-9}  & **CO** & **DC** & **CO** & **DC** & **CO** & **DC** & **CO** & **DC** \\ \cline{2-9}  & **(\%)** & **(\%)** & **(ppm)** & **(\(\mu\)g/m\({}^{3}\))** & **(ppm)** & **(\(\mu\)g/m\({}^{3}\))** & **(ppm)** & **(\(\mu\)g/m\({}^{3}\))** \\ \hline F1 & 15.6 & 27.3 & 18.9 & 303.3 & 11.1 & 114.0 & 2.2 & 45.83 \\ F2 & 13.9 & 18.7 & 13.5 & 246.4 & 8.0 & 120.7 & 1.3 & 31.35 \\ F3 & 4.3 & 15.7 & 8.5 & 228.1 & 7.1 & 124.0 & 0.3 & 26.77 \\ F4 & 18.6 & 14.3 & 17.3 & 261.3 & 8.5 & 131.1 & 2.4 & 28.08 \\ F5 & 23.2 & 11.1 & 13.0 & 291.6 & 4.8 & 172.6 & 1.9 & 27.10 \\ S6 & 29.0 & 10.5 & 19.0 & 306.2 & 7.8 & 211.5 & 3.8 & 27.12 \\ F7 & 7.1 & 9.9 & 15.4 & 302.1 & 10.7 & 212.0 & 0.9 & 24.48 \\ F8 & 8.2 & 10.4 & 15.1 & 307.0 & 8.9 & 214.1 & 0.9 & 27.06 \\ F9 & 5.4 & 11.3 & 11.9 & 298.7 & 7.8 & 198.3 & 0.6 & 27.60 \\ F10 & 7.1 & 17.9 & 12.9 & 298.7 & 8.7 & 129.8 & 0.8 & 41.87 \\ F11 & 7.6 & 11.3 & 14.7 & 305.4 & 10.5 & 199.9 & 0.9 & 28.89 \\ F12 & 17.6 & 11.3 & 17.1 & 308.2 & 7.8 & 210.4 & 2.4 & 28.03 \\ F13 & 12.9 & 9.6 & 17.4 & 305.4 & 10.3 & 213.2 & 1.6 & 23.61 \\ F14 & 23.0 & 21.9 & 15.8 & 248.9 & 5.5 & 102.8 & 2.7 It is clear from Table 1 that the overall average, overall minimum, and overall maximum of air relative humidity in investigated settings were 23.8%, 12.3%, and 43.0%, respectively. Moreover, the overall average, overall minimum, and overall maximum air temperature in investigated settings were 34.1 \({}^{\circ}\)C, 21.2 \({}^{\circ}\)C, and 44.3 \({}^{\circ}\)C, respectively, and for atmospheric pressure, the values were 895.3 hPa, 795.8 hPa, and 963.1 hPa, respectively (Table 1). Finally, by exploring Table 2, the range of coefficient of variation for carbon monoxide concentration was 4.3% to 29.0%, the maximum range was 8.5 ppm to 19.2 ppm, and the minimum range was 4.8 ppm to 11.3 ppm. Moreover, the range of coefficient of variation for dust concentration in the air was 7.4% to 27.3%, the maximum range was 228.1 \(\mathrm{\SIUnitSymbolMicro m}\)/\(\mathrm{m}^{3}\) to 309.5 \(\mathrm{\SIUnitSymbolMicro g}\)/\(\mathrm{m}^{3}\), and the minimum range was 102.8 \(\mathrm{\SIUnitSymbolMicro g}\)/\(\mathrm{m}^{3}\) to 214.1 \(\mathrm{\SIUnitSymbolMicro g}\)/\(\mathrm{m}^{3}\).