ここから本文です。 更新日:平成24年5月25日 サイトの使い方 How to use Environmental Class Nature Class 用語集 Vocabulary Question10 As everyone is familiar about the global warming problem, by comparing the past 100 years how fast is the temperature rising starting from latter half of 1990's to 50 years from now? 1.5 times faster 2 times faster 3 times faster