What causes the leaves on trees to change colour? What causes the leaves on trees to change colour?
- Change in Temperature
(32%)
- The Chlorophyll disappears
(29%)
- The leaves start to die
(12%)
- Someone coloured them with magic-marker
(9%)
- Not enough sunlight
(8%)
- Other - please discuss
(3%)
- It's time to harvest
(3%)
- Not enough light or water
(2%)
- Not enough water
(1%)
Votes: 1366
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