The human relationship with nature: development and culture

The biophilia hypothesis : empirical support and amplifying evidence

The biophilia hypothesis : conceptual difficulties and empirical limitations

The psychological framework : structure and development

Obligatory and discretionary morality

Structural-developmental methods

The Houston Child Study

The Houston Parent Study

The Prince William Sound Study

The Brazilian Amazon Study

The Portugal Study

Epistemology, culture, and the universal

Environmental education.