…Greenpeace has echoed calls by…Unilever to impose a moratorium on deforestation in Indonesia in support for the company's pledge to purchase only certified sustainable palm oil…Unilever has committed to using only palm oil from certified sustainable sources from the second half of this year. The company said it would ensure the palm oil it used in Europe was also certified as sustainable by 2012…Unilever is the world's biggest consumer of palm oil…The company's decision came after a Greenpeace campaign revealed Unilever's suppliers are…clearing Indonesia's peatlands and rain forests. According to Greenpeace, destruction of peatland rain forests contributes 4 percent of global greenhouse gas emissions.