TY - JOUR TI - On the Utility of Counting Joules: Reply to Comments by Mario Giampietro PY - 2008 AU - Helmut Haberl T2 - Journal of Industrial Ecology LK - http://doi.wiley.com/10.1162/jiec.2006.10.4.187 DO - 10.1162/jiec.2006.10.4.187 ER -