(SeeNews) - Dec 4, 2012 - Suzano Energia Renovavel, the start-up renewable energy arm of Brazilian paper and cellulose maker Suzano (SAO:SUZB5), may have to lift the investment in its first three wood pellet manufacturing plants to USD 1 billion (EUR 766.1m) from previously planned USD 800 million, Suzano's CEO, Antonio Maciel Neto, said yesterday.