Every autumn, green leaves turn gold, orange, and red before they fall. This short course explains what's happening inside the leaf: why leaves are green in the first place, the yellow and orange pigments hiding underneath all along, the reds the tree makes fresh in fall, what actually triggers the change, and why some years and some trees put on a far better show than others.
Every autumn, green leaves turn gold, orange, and red before they fall. This short course explains what's happening inside the leaf: why leaves are green in the first place, the yellow and orange pigments hiding underneath all along, the reds the tree makes fresh in fall, what actually triggers the change, and why some years and some trees put on a far better show than others.
