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Updated on July 15, 2005

Prevent Global Warming!

Over the past century, temperatures across the world have risen by an average of 0.6 degrees celsius. A wide variety of issues, such as meteorological problems and an increase in infectious diseases, are of increasing concern. The increase in greenhouse gases, which have been chiefly produced by human activities, are said to be a major cause.


Let's Save Energy!

Although greenhouse gases include methane and chlorofluorocarbons (CFCs), the main gas is carbon dioxide (CO2), which is produced whenever energy is generated from oil, coal or city gas.
If energy use is restricted, the amount of CO2 generated will be reduced. Let's promote measures to tackle global warming by working to save energy.

  • Solar Power Generation
    The Asaka Water Purification Plant is home to one of Japan's largest solar power generation facility. Operated by Tokyo's Bureau of Waterworks, the plant's some 11,000 square meters of solar panels generate 1,200 kilowatts of electricity, which is equivalent to the power consumed by about 4,000 households.


  • Wind Power Generation
    Tokyo Waterfront Wind Power Generator, "Tokyo Kazaguruma," boasts gigantic blades measuring 26 meters in length. Two generators can produce enough electricity for about 800 households.


  • Energy Efficient Home Appliances
    Helping to cut electricity bills as well as helping to prevent global warming.


  • LED Traffic Lights
    Light emitting diode (LED) traffic lights consume one-sixth as much electricity as conventional signals.


Increase Greenery in Tokyo!

Over the past century, the average temperature in small to medium cities in Japan has risen by about 1 degree. In Tokyo, however, it has risen some 3 degrees. Global warming is not the only factor responsible for this increase. Tokyo's "heat island" phenomenon has also been a contributing factor to rising urban temperatures.
Implementing measures such as introducing greenery to the city is effective in cooling the Tokyo area. Increase green belts to help reduce the "heat island" problem.

  • Elementary School Plants Grass Field
    Izumi Elementary School in Suginami-ku has planted turf inside the school grounds. The school hopes that the grass field will contribute to the well-being of the students and also help to tackle the problem of rising temperatures.


  • Rooftop Vegetation
    Vegetation has been planted on the rooftop of the Tokyo Metropolitan Assembly Building.


  • Roadside Trees
    Planting trees along the roadside helps to shade the surrounding ground from the summer sun and cool the air.


Join Tokyo's Environmental Efforts!

Tokyo is leading a number of intiatives aimed at preventing global warming and dealing with the growing heat problem.
Let's think global and act local!

  • Tokyo's Great Water Sprinkle
    Last August, Tokyo citizens groups coordinated an event in several parts of Tokyo to pour water on the streets, a practice called "uchimizu." Dubbed the Great Edo Water Sprinkle, the event was aimed at lowering air temperatures through the natural evaporation process of water.


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