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1·SAKU, Japan: Winding past rice paddies and lazily blowing its whistle along bubbly creeks, a two-car train in rural northern Japan is the latest entrant in the battle against global warming.

佐久，日本：缠绕过去稻田和懒洋洋吹了哨子泡沿着小溪，一两节车厢在北部郊区，是日本最新的笔试在对抗全球变暖。