She had never thought much about purity and pollution, in her short life.

A lot of the fish died off, and people began worrying about pollution.

Who's going to care about pollution on a world like this?

These communities also worry about pollution produced by the development.

It is about pollution and its effects on the environment.

No, wait, you'll be talking about industrial pollution in a minute.

Made in 2006, the video is about pollution and its effects on the environment.

The concerns about environmental pollution and public health are understandable.

For those worried about pollution, these results are not good news.

But have you ever talked to them about light pollution?