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Over time, the cumulative effects of everyday weather events can effect great change on a place.  Wind blows sand that slowly abrades surfaces.   Water drips into cracks, rotting wood in the summer and freezing and expanding, cracking wood and concrete in the wintertime.  Bright sunlight bleaches the color out of finishes and fabrics, and may cause some materials to break down after years of exposure.   Acid rain and pollution cause the deterioration of roofs and paint.

People effect change on places too.  Hinges break and doors creak after years of constant use.  Vandalism weathers property in a hurry: broken windows, smashed-in doors, and grafittied walls.

Human weathering, use and abuse, and climatalogical weathering effect natural communities as well. 

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