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1·The paper builds on earlier research by Ryan, Netta Weinstein, a psychologist at the University of Hamburg, Germany, and others showing that people are more caring and generous when exposed to nature.

这篇论文是基于ryan和Netta Weinstein的早期研究而作，Netta Weinstein，德国汉堡大学的心理学家，其他研究显示，当人们接触自然是会变的更有同情心，更大方。