I thought it would be good to do some advertisement for those little known but very helpful guides to encourage green filming practices:
The EMA Green Seal program permits the Environmental Media Association to simultaneously promote sustainable production methods and highlight those in the industry who’ve made strides incorporating such practices into both film and television productions.
The UK Film Council has recently announced plans to make London the greenest place to film. This page outlines their overall strategy and links to a guide for greener filming.
This website provides many resources for productions wishing to film in New Mexico, including a green filmmaking guide, and outlines incentives for filming in the state that benefit environmentally sensitive productions.