Recently, researches start to analyze subjective happiness index. This study examines the ef fect of environmental protection on happiness after eliminating the ef fect of economic factor such as Gross domestic products and unemployment. We analyze four environmental indices: local pollutants of suspended particulate matters (PM10) and sulfur dioxide (SO 2 ) and global environmental indices of energy use and carbon dioxide. The result implies that only the deterioration of pollution level of

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... 0 and SO 2 have a negative effect on happiness, and reduction of these pollutants contribute to improve happiness.