Last updated at 10:26 BST, Tuesday, 22 April 2014

Air pollution in China

Smog in Beijing

Smog fills the air over the streets of Beijing

Officials in China are dealing with a serious problem that's affecting people's health.

At certain times, the air in big cities such as Shanghai is so polluted people cannot go outside.

The dirty air, known as smog, is a combination of weather conditions, fumes and smoke from cars and factories.

Rob and Finn discuss what is being done to clean up the air and explain some pollution-related vocabulary.

This week's question:

According to research by the World Health Organisation, which country has the city with the world's worst air pollution? Is it:

a) China

b) India

c) Iran

Listen to the programme to find out the answer.

Listen

Air pollution in China

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Vocabulary

air pollution

particles that make the air dirty and difficult to breathe

smog

mixture of smoke, gases, chemicals and fog

choking

(here) preventing people from breathing properly

contaminated

made dirty or less pure

pea-souper

a slang term used to describe poor quality air that is difficult to see in

fumes

strong-smelling and dangerous gas

industrialised

having lots of heavy industry

poisonous

very harmful and could cause death

asthma

medical condition that makes it hard to breathe

greener

(here) better for the environment

renewable energy

power made from natural resources that never get used up

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