Through the 1960s and 1970s, the society began to use its influence to focus attention on a wider range of environmental issues and became involved in developing major new environmental protection policies and laws.
Ao longo das décadas de 1960 e 1970, a sociedade empezou a usar a súa influencia para enfocar a atención nunha ampla variedade de asuntos ambientais e implicouse no desenvolvemento de importantes novas políticas de protección ambiental e leis.