But, in sharp contrast, a Japanese aquarium decided on a novel way to save energy -- it employ electricity generated by an electric eel to light up its Christmas tree.

• 香港的环保主义者们可不会被五光十色的节日霓虹所迷惑，她们称带有霓虹灯的圣诞老人和七彩闪光灯消耗了大量电能。