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This question already has an answer here:

if the evolution makes the species better then why the leaf and trees are not black??

black colour absorbs more ligth than simply the green color so a black plant should make photosinthesis better then why aren't the plants black ?

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merged by Mad Scientist May 18 '15 at 7:05

This question was merged with Why do plants have green leaves and not red? because it is an exact duplicate of that question.

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