Abstract
Using political opportunity theory we will analyze the way in which American and Mexican environmental groups use the contradictions between a value system and a set of social practices; the sudden mishaps; the illegitimacy or vulnerability of a government; and the availability of an innovative frame of action that allows them to convey their protests and vindications, in order to determine their possibilities and limitations.

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Copyright (c) 2017 Mario Alberto Velázquez García
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