Autumn’s usual red, orange and yellow leaves arrived later than usual this year and in some places, leaves didn’t change color at all. Does this have anything to do with global warming?

In, Andrea Thompson reports that delayed fall foliage occurred not only in the US, but also in parts of Europe. The reason could be drought, but it could also be global warming. But if climate change IS the cause, it’s not because of warmer temperatures, it’s because of higher levels of carbon dioxide, since experiments where scientists exposed trees to elevated levels of carbon dioxide showed that they retained their leaves and stayed greener for a longer period of time.

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