15-05-2015 07:00

China has bad air pollution. It is so bad that it has 16 cities on one list. This list has 20 cities on it. They have the worst air pollution in the world.

Someone makes an app. The app shows what factories make too much air pollution. It shows it with data. People can share this data. They can put it on social media. They can show it to officials. The officials can help.

One official likes the app. He thinks that it will help people. He thinks that it will help with air pollution.

Difficult words: air pollution (very small things which are in the air, and which are bad), data (numbers), officials (bosses of the country).

You can read the original story and watch the video in the Level 3 section.