The article which I read last week was about the new way to cool down the building without using the electricity. The way was to set a special mirror on the roof of the building which let the radiation from the sun sent to the space by reflecting it.
When I read this article, I was very surprised because if we use this system in the future, the total of the consumption of the electricity will decrease. Like USA which use a lot of electricity in summer for the air-conditioning, I think this will do very effectively.Recently, it is claimed that the global warming is getting worse and worse. I think we can  stop  or slower the global warming by it. I think there are a lot of advantages to use this system. In this point, I am for this environmentally-friendly plan very much.