Table 5.

Tree allergenicity and VOCs emission capacity; h = high, l = low.

Species	Allergenicity	VOCs emission
Acer pseudoplatanus	h^{^z}	l^{^y}
Ailanthus altissima	h^{^z, ^x, ^†}	l^{^w}
Betula pendula	h^{^z, ^x}	l^{^w}
Carpinus betulus	h^{^z, ^x}	l^{^w}
Ginkgo biloba	h^{^z, ^x, ^†}	l^{^w, ^v}
Platanus × hispanica	h^{^x}	l^{^w} h^{^w}
Quercus robur	h^{^z, ^x}	h^{^w, ^v}
Robinia pseudoacacia	h^{^z}	h^{^w, ^v}
Tilia cordata	h^{^z}	l^{^y}

↵^z Ogren (2000)
↵^y Karl et al. (2009)
↵^x Carinanos and Casares-Porcell (2011)
↵^w Loreto et al. (2014)
↵^w Kesselmeier and Staudt (1999)
↵^v Benjamin and Winer (1998)
↵^f Female