vertical view of the crown of a kiri paulownia tree in full bloom in the castellana madrid spain

absorb alien species amounts applications atmosphere benefits blue sky branches carbon dioxide castellana chinese tree city botany co2 common crown cultivate deciduous empress environment friendly europe exotic fast growing fastgrowing foxglove foxglovetree full greenery hardwood introduced invasive kiri large logging madrid naturalised paulownia tomentosa paulowniaceae pollution princess reforestation shoots spain sprout sustainable top valuable versatile vertical white bloom