Visitors pose in front of sculptures during an exhibition in the forecourt of the San Martin Square, in Buenos Aires, Argentina, on Nov. 7, 2014. According to local press, the exhibition contains over 70 sculptures made completely of plastic waste. The works were made by students of junior high schools guided by Argentine artist Edgardo Rodriguez, who has devoted many years to the transformation of the waste into art as a way to meditate on the impact of the waste in the daily life. (Xinhua/Martin Zabala)