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Artist on her knitwear for trees: 'It has a positive effect'

18 September 2013 Last updated at 16:43 BST

Brazilian artists are knitting ornaments to hang around trees and poles in Sao Paulo, the country's biggest and busiest city.

The BBC spoke to Leticia Mota, one of the knitters, who said she believes the decorations remind "people of their mothers and grandmothers".

Video produced by Paula Idoeta