Biofuel... a friend or foe?

I kept coming across articles on biofuel recently. While it 'presented' itself as 'green', sometimes I wonder if it is really helping the environment. Nature news reported that 'biofuels might create more emissions than they save'. I believe there are some good things in biofuel but maybe we should seriously consider other modes -making use of the waste or readily available materials to create fuel than converting native land to agriculture for biofuel. No human can 'rebuild' the native land. Once it is lost, it is gone.