1. Последний лист

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    Scientists believe that the average time can be set to the date of purchase leaves in autumn coloring, leaf fall for a start ... But how quickly the tree defoliation strongly depends on the autumn. From the wind, from the rain, the air temperature ... But is that the only factors that affect the frequency of processes in the plant? Maybe urban trees that grow in the conditions of a strong light pollution has long been developed in violation of all the rhythms? Let's try to establish whether this is the beginning of the example birches growing in different natural or anthropogenic (ie man made) environment!
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