白化现象是指在正常的环境条件下，植物由于某些内在因素(如遗传性等)不能形成叶绿素的现象。例如玉米、向日葵的白化苗和某些观赏植物叶片的局部白斑。全部白化的植株，因不能制造有机物质而迅速死亡。动物由于变异或环境的影响，亦可出现白化现象。
这组图展示了动物王国中各种白化现象的实例。
In this gallery, we look at various examples of albinism in the animal kingdom.
澳大利亚科学家表示，澳洲大堡礁北部和中部的珊瑚至少有35%已被珊瑚白化现象摧毁。
At least 35% of corals in the northern and central parts of Australia's Great Barrier Reef have been destroyed by bleaching, Australian scientists say.
提交给联合国教科文组织的报告称，大堡礁的规模和复原力意味着，今年它能从白化现象中恢复过来。
The report to Unesco said the reef's scale and resilience meant it could recover from the bleaching this year.
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