Smoggy London

If you had been visiting London last week you would have noticed it was very smoggy, as if you were looking at everything through a dirty cloud! But what exactly is smog, and how is it different to fog?

What is fog?

Fog is a cloud on the ground! It is a natural part of the weather. It is lots of very tiny water droplets floating in the air. Fog helps plants by providing moisture and does not harm you if you breathe in.

What is smog?

Smog is a kind of air pollution. Smog is created when fog mixes with smoke and chemical fumes from cars and factories. Some of the chemicals in smog are toxic – this means poisonous! It is harmful to plants and animals and can be dangerous if breathed in.

The recent smog in London is a mixture of fog and pollution and a third ingredient – sand from the Sahara desert! The Sahara desert is a huge desert in Africa. Some of the desert sand is very, very small, like dust. Sometimes wind storms sweep up the dust and blow it thousands of miles to the UK. It’s amazing how far it travels!

Unfortunately, this mixture of fog and pollution and desert dust means that the London smog is not good for your lungs, and has made some people ill. Smog is one very good reason why we should all try to reduce air pollution!

So what can you do to help reduce air pollution?

Think about air pollution… What causes it? Can you think of 3 things you can do to reduce it? Why not talk about it in class and then click here to check your answers.