Plastics and their recycle Demand of plastics has very wide variety as shown in the figure below for Japan. Such variety makes the recycle more difficult. Material recycle, chemical recycle and thermal recycle are evaluated in terms of environmental loading. Comprehensive strategy for the best mix of several types of recycle methods. Analyses of urban heat environment Various kinds of urban activities have impacts on urban climate.
Higher temperature is observed in urban area.
Such temperature shift makes the urban area more uncomfortable. Energy consumption for space cooling would increase, in other words, more CO2 is emitted due to locally hotter climate condition in summer. Environmentally sound city aims at maintaining high amenity inside the city with giving less impact to the external environment. Urban climate should be mitigated from this viewpoint. The factors which influence urban heat environment are anthropogenic heat discharge, change of land surface and geometric change of urban area.