Correspondingly, the population of light-coloured moths rose when pollution levels fell.

相应地，当污染水平下降时，浅色蛾的数量会有所增加。

Air pollution levels in Rome have dropped 49 percent compared to a year ago.

与去年相比，罗马的空气污染水平降低了49%。

As India makes economic development a priority, pollution levels are only set to increase.

随着印度将经济发展摆在首位，造成污染水平增加。

High air pollution levels are also been recorded in the Iranian capital Tehran.

伊朗首都德黑兰的空气污染水平已达到了历史最高。

Pollution levels are now decreasing allowing some folks to start flushing out their waterlines.

随着现在污染等级下降，一些民众能够用水冲洗输水管道。

In the Indian capital, officials are struggling to reduce severe air pollution levels.

在印度首都新德里，官员们正在努力降低严重超标的空气污染水平。

They remove a seemingly endless supply of trash and test pollution levels in the water.

它们消除了看似无穷无尽的垃圾，并测试了水中的污染程度。

But as pollution levels rise and spike, it's our children that will pay greatest price.

但随着空气污染等级不断飙升，我们的孩子将为此付出巨大的代价。

The citizens say the government has done little to try to cut severe pollution levels.

这些市民表示，政府对减少严重污染水平方面做得太少了。

China's pollution level increased last year for the first time after five years of decreases.

中国的污染水平在连续五年下降后，去年首次上升。

And so, what this scheme has done is to play a role to moderate the high pollution levels.

所以，这项措施的目的就是减缓污染的速度。

The researchers looked at pollution levels, both inside enclosed buildings and in the world around us.

研究人员对封闭式建筑及周遭环境的污染水平进行了调查。

Many children wore face masks as they return to lessons. Pollution levels in the area remain high.

许多孩子戴着口罩返校上课。该地区的污染水平仍然很高。

The restrictions were ordered as the city government declared a public health emergency because of pollution levels.

由于污染严重，市政府宣布进入公共健康紧急状态，这才出台了这一禁令。

The environment ministry said earlier this week that mostly good weather will keep pollution levels in control.

环保部本周早些时候表示，大多数良好的天气将使污染水平得到控制。

The technology is promising but would require widespread use to to make a real difference in pollution levels.

这项技术前景看好，但需要广泛使用，才能真正改变污染水平。

It will track their pollution levels and label cities green for cleaner air and red for dirtier air.

会对这些城市的污染水平进行跟踪监测，洁净空气的城市会被标记为绿色，而污染严重的城市则标为红色。

It's intended to help the public see and take action in response to high pollution levels.

这一举措旨在帮助公众意识到污染的严重性然后采取措施及时治理。

Maintaining safe speeds and being electric, self-driving cars would drastically reduce pollution levels and dependency on non-renewable fuels.

通过保持安全车速行驶和以电为动力，无人驾驶汽车可以大大降低污染程度，并且减少对不可再生能源的依赖。

And that will reduce the air pollution levels, and that will then allow you to generate more solar electricity.

这就会减少空气污染的程度，进而产生更多太阳能电力。”