Average values over all rural stations which reported data over at least eleven years in the period 1996-2009. The black line corresponds to the 5-year averaged value. Variations over Europe in observed values is large, eighty percent of the observations falls with the red shaded area.
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Be careful when buying for your garden. People are one of the main introducers of invasive species, especially flora. Many of the invasive species have been introduced for ornamental purposes. Do put an extra effort in finding out whether the plant you want is native to your environment.
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