wilted bloom flowers from a kiri paulownia tree on the leaves of a green hedge row in the castellana, madrid spain

absorb alien species amounts applications atmosphere benefits bush carbon dioxide castellana chinese tree city botany co2 common cultivate deciduous empress environment friendly europe exotic fast growing fastgrowing foxglove foxglovetree view green leaves greenery hardwood hedge horizontal introduced invasive kiri large logging madrid naturalised paulownia tomentosa paulowniaceae pollution princess reforestation shoots spain sprout sustainable valuable versatile wilted bloom flowers