*Vigor and Health of Urban Green Resources under Elevated O3 in Far East Asia DOI: http://dx.doi.org/10.5772/intechopen.106957*

Japan analyzed the growth differences between growing sites and the effects of the pollution (e.g., NOx, SO2, and OX, etc.) on tree growth (cf. **Table 1**). When exhaust gas of diesel cars circulates between urban areas and suburbs, the following chemical reactions occur: in the urban area; NO (from diesel cars) + O3 ⇌ (Ultraviolet ray) ! NO2 [65]. Moreover, environmental conditions seem to positively affect tree growth, though with the exception of O3, which had strong negative correlations with growth.
