efe-epaBy Alba Santandreu Entre Rios do Oeste, Brazil

Pigs have become the latest allies of renewable energy in Brazil, with a growing number of farmers producing biogas using animal waste.

In the town of Sao Miguel do Iguaçu, in the State of Paraná, pigs have always been a source of income for the Colombari family, but they have acquired a new value thanks to gas produced by the decomposition of their manure.