What causes the leaves to change color?

SOUTH HADLEY & HADLEY, Mass. (WWLP) – People from near and far flock to New England when the leaves change, a process many people take for granted without knowing what’s actually happening to the trees.
Saturday’s weather was just perfect for heading up to Skinner State Park in central Hampshire County to enjoy the hiking and the foliage.
“There’s some very pink looking leaves and oranges and the really bright reds are nice,” said Lia Ciemny from Groton
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