《Unmasking Fall Colors》 - 免费有声读物

Beneath autumn's colourful display are a trio of pigments - chlorophyll, carotenoid and anthocyanin, and the green, golden and red colours we see is a direct result of their delicate balance. But these colours do more than just delight our eyes, they perform functions that are essential to the tree's survival. Which one does the major work, which one protects and serves, and which one arrives with all the glory? And exactly what role does the weather play?