By spring, the leaves on trees grow and assume the color green, and by autumn, they change to sometimes brilliantly warm colors and fall. But why do they do that? Every fall season, nature lovers ...

Leaves also contain carotenoids, which produce yellow, orange and brown colors. In the autumn, they begin to produce more anthocyanin , which gives them red and purple hues.

Leaves also contain carotenoids, which produce yellow, orange and brown colors. In the autumn, they begin to produce more anthocyanin , which gives them red and purple hues.

We're officially in autumn, and one thing lots of people associate this season with is the changing colours of the leaves. But the National Trust, which works to protect the natural environment ...