Abstract
This study sent out a questionnaire about CO2 reduction by planting of trees to residents of detached houses. The results of questionnaire indicated that when information was included about " CO2 reduction by planting trees " ,there was a significant difference in the number of respondents who selected the plan for CO2 reduction, compared to those who did not receive the information. In addition, providing information about CO2 reduction resulted in increased awareness of people concerning greenery and the environment. Therefore it was suggested that providing information on this topic will promote the use of greenery around detached houses as a countermeasure to global warming.