No more pollution of your food, water and air.

你们的食物也不再有毒素，水源和空气也是如此。

youdao

No one has offered an official explanation, but it's more likely the color comes from sewage, pollution or a water treatment process.

没有人提供官方解释 但这颜色更可能来自地下污水 污染水或是水处理。

youdao

What's more, there is no Freon refrigerant in the new system and no pollution effect.

其次，该系统中没有氟利昂制冷工质，对环境没有污染。

youdao

Boilers burning dirty heating oils No. 4 and No. 6 produce 50% more air pollution than all of the cars and trucks in New York City and contribute to more than 3, 200 premature deaths every year, according to recent reports by the Environmental Defense Fund and the New York City Department of Health.

FORBES: Big Apple's Nasty Boilers

There are no dams and no pollution, two man-made insults that have destroyed runs of salmon in more developed areas.

FORBES: Catch and Release

Its guidelines say average concentrations of the tiniest pollution particles - called PM2.5 - should be no more than 10 microgrammes per cubic metre but UK standards allow up to 25.

BBC: Dust from recycling plants 'puts residents at risk'