At the Gose water purification plant in Gose City, Nara, one of the largest solar power generation plants in western Japan has been installed to reduce emissions of CO2 -- the cause of global warming. The installed solar panels have an area of about 6,272 m2, almost the same size as a soccer field, and supply approximately 810,000 kWh annually. This is equivalent to the power used by 218 typical homes in one year.
As a result, the system reduces CO2 emissions by 208 tons per year, and converted to forest absorption, this corresponds to a forest area of 83 hectares. So the panels have an effect the same as a forest the size of 24 Osaka domes. Converted to petroleum energy, the system saves 195 kL, or 975 metallic drums of oil per year.