Reciprocity Foundation is organising a fair on “sustainability” on February 10 and 11 at Kalakshetra Foundation in Thiruvanmiyur. According to a press release, the event will feature stalls selling environment-friendly products, workshops on sustainable practices, sessions on green buildings, waste segregation and composting. Concerts, art shows and games are also part of the festival. No entry fee will be charged, adds the press note. Time: From 10 a.m. to 8 p.m. For more details, call 99625 04155.