Water in the prehistory of cooking 

Five-hundred thousand years ago, when fire was discovered, man began cooking his food. However, it is not possible to know when man started using water for cooking. Cooking with boiling water probably started with the discovery of ceramics, but before this, water could have been used for macerating foods and making them more palatable. FLANDRIN, J-L, MONTANARI, M. História da alimentação. São Paulo: Estação Liberdade, 1998. 

Planet’s Water 

Water is the main source of life in our planet. It is a resource that needs to be preserved and that should be accessible to everyone.

For reading:   http://www.unmultimedia.org/radio/portuguese/wp-content/uploads/2011/08/primeiro-cap-design1.pdf

For listening:  http://www.unmultimedia.org/radio/portuguese/2011/08/especial-agua-o-mundo-e-um-recurso-precioso/