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http://gigazine.net/news/20161223-jet-engine-clean-air/

http://www.news-postseven.com/archives/20161219_475378.html

http://www.sankei.com/affairs/news/161224/afr1612240013-n1.html

http://www3.nhk.or.jp/news/html/20161223/k10010818041000.html

http://www.kobe-np.co.jp/news/shakai/201612/0009774055.shtml

http://shidou-life.net/ooita3.html http://www.nishinippon.co.jp/nnp/national/article/297522

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https://news.nifty.com/article/magazine/12107-20161223-2016122100207/

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http://www.nhk.or.jp/sapporo-news/20161222/5454801.html

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http://blog.goo.ne.jp/tks-naito/e/5c9883001dc9e717e8c7dbfecb2c5845

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https://twitter.com/shint_arrow1214/status/810639388564566016

http://www.courts.go.jp/app/hanrei_jp/detail2?id=86355

http://www.asahi.com/articles/ASJDL7HCWJDLUTIL01Z.htmlhttp://www.courts.go.jp/app/hanrei_jp/detail2?id=86352

http://www.yomiuri.co.jp/national/20161219-OYT1T50087.html

http://headlines.yahoo.co.jp/hl?a=20161219-00000050-mai-soci http://www.courts.go.jp/app/hanrei_jp/detail2?id=86354

http://gigazine.net/news/20161215-trump-climate-data/