the show of a kiri paulownia tree in full bloom spread on the road side of the castellana, madrid spain

absorb alien species amounts applications asphalt atmosphere benefits carbon dioxide castellana casting chinese tree city botany co2 common cultivate deciduous diagonal empress environment friendly europe exotic fast growing fastgrowing foxglove foxglovetree full bloom greenery hardwood horizontal introduced invasive kiri large logging naturalised paulownia tomentosa paulowniaceae paving pollution princess reforestation road shadow shoots sprout sustainable valuable versatile