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Since humans began clearing the forest during the New Stone Age , most of the land has now been deforested , speeding the natural processes of erosion .
 time: New Stone Age
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 time: New Stone Age