There are two types of indicators of environmental impact: means-based, which is based on the farmer's production methods, and effect-based, which is the impact that farming methods have on the farming system or on emissions to the environment.
Cultural criticism, or cultural studies, is related to New Historicism but with a particular and cross-disciplinary emphasis on taking seriously those works traditionally marginalized by the aesthetic ideology of white European males.
1 Schools of Literary Criticism.  New Criticism: Focuses on objectively evaluating the text, identifying its underlying form. May study, for example, a text's use of imagery, metaphor, or symbolism. Isn't concerned with matters outside the text, such as biographical or contextual information.