Kids from Bristol and Beijing talk air pollution
23 February 2015 Last updated at 08:57 GMT
What can children living in Bristol learn about air pollution from those living in Beijing?
Martin went to a school in Bristol, set between two motorways, where they spoke to children living in Beijing in China.
In Beijing the air pollution is so bad that kids often can't play outside, and sometimes it's even difficult to see the other side of the street clearly.
The kids in Bristol find out about the issues facing children in China's capital city.