Unilever claims that its involvement in the RSPO-endorsed scheme helps the company move towards its target of buying all its palm oil from certified sources by 2015. As the segregated supply chain - the ability to keep sustainable palm oil separate from non-sustainable from plantation through to finished products - is still relatively undeveloped, Unilever argues that the GreenPalm scheme is a viable alternative in the meantime. "Until sustainable segregated supply chains become available, GreenPalm certificates are the best option to encourage growers to comply with the requirements of the RSPO and certify their plantations as sustainable," Unilever's senior vice president of global communications and sustainability Gavin Neath said. Segregated supply chain developing Although the sustainable segregated supply chain is very much in its infancy, progress is being made.