Limitations and drawbacks of using Preliminary Environmental Reports (PERs) as an input to environmental licensing in São Paulo State: a case study on natural gas pipeline routing - Kirchhoff, Denis; Montano, Marcelo; Ranieri, Victor Eduardo Lima; Oliveira, Isabel Silva Dutra de; Doberstein, Brent; Souza, Marcelo Pereira de (Environmental Impact Assessment Review, 2007)