Examples range from contamination of the food or water supply, to high levels of air or noise pollution, a chemical accident, a disease outbreak or a natural disaster.

这方面例子的范围包括从食物或水供应的污染，到空气或噪音高度污染、化学事故、疾病暴发或自然灾害。

youdao

According to experiment data and relevant material, water in the building water supply systems suffers contamination to different extent, so water wastes as a result of polluted water drainage.

实验数据和有关资料表明，水在建筑给水系统中受到了不同程度的污染，不合格水的外排，导致了水量浪费。

youdao

Local residents have expressed concern that the process - known as fracking - could lead to the contamination of the water supply.

BBC: Keynsham fracking plans put on hold by UK Methane