Plants	Location		Mean
Plants	Urban area	Rural area	Mean
Eucalyptus leaves	0.194 ± 0.002	0.052 ± 0.005	0.132
Olea leaves	0.136 ± 0.003	0.015 ± 0.003	0.075
Zizphus leaves	0.155 ± 0.005	0.032 ± 0.005	0.093
Conocarpus leaves	0.197 ± 0.001	0.064 ± 0.000	0.130
Mean	0.173	0.040