lunes, 19 de noviembre de 2012

viernes, 16 de noviembre de 2012

Plásticos comodities (Por Gastón Bianco)

miércoles, 7 de noviembre de 2012

Plastics at home


After watching this video, answer these questions:
1-Are all plastics created equal
2-What is the name of the plastic used to store food that has caused controversy?
3-Are there any safe plastic containers? how can we recognize them?