:00:20. > :00:26.I am high above London, where air pollution has hit its worst level
:00:27. > :00:36.today. First, playground politics in Westminster. Year for at Dairwendeg
:00:37. > :00:40.primary school told us they thought they were acting like children. Alex
:00:41. > :00:43.thinks it is ridiculous and childish. Those are just some of the
:00:44. > :00:48.comments you have been sending in, telling us exactly what you think of
:00:49. > :00:50.two of the most important politicians in the UK hurling
:00:51. > :00:56.insults at each other in Parliament. Most of you are not too impressed.
:00:57. > :01:00.Yesterday, Ed Miliband called the Prime Minister this... And then
:01:01. > :01:08.David Cameron called Ed Miliband a Muppet. It is basic maths, not so
:01:09. > :01:14.much The Wolf Of Wall Street, more the dance of Downing street. I will
:01:15. > :01:18.take a lecture from almost anyone in the country about the sale of Royal
:01:19. > :01:24.Mail, but not from the two Muppets who advised the last Chancellor on
:01:25. > :01:28.selling the gold. This morning, David Cameron defended his use of
:01:29. > :01:31.Muppets, saying there is a lot of banter in Parliament, and it was not
:01:32. > :01:37.inappropriate. We have been to a school in London to see what they
:01:38. > :01:40.thought. Why do you think they are acting so childish, aren't they
:01:41. > :01:43.supposed to be setting an example? It is a great question. You would
:01:44. > :01:48.not expect your parents to behave like that, you should not expect the
:01:49. > :01:53.leader of the country to behave like that, or someone who wants to be the
:01:54. > :01:59.leader of the country. But remember, this is a one-off, a really rare
:02:00. > :02:05.situation. What do you think about the argument? I do not think there
:02:06. > :02:08.are any MPs who approve of it, and I suspect the Prime Minister does not
:02:09. > :02:12.approve, or the leader of the opposition. I think the fact that
:02:13. > :02:16.you, the younger generation, are making it clear that this is a bad
:02:17. > :02:22.example, is a pretty good lesson, not just to the two leaders, but to
:02:23. > :02:27.every MP in Parliament. How do you feel about the language that has
:02:28. > :02:31.been used in the House of Commons? We are not allowed even to call each
:02:32. > :02:35.other by our names. If you were an MP, I would be standing up, and if I
:02:36. > :02:40.wanted to comment on something you said, I would have to say, the
:02:41. > :02:45.honourable lady. I am not allowed to mention your name. That is designed
:02:46. > :02:50.to stop us trying to get too personal in our exchanges. I will be
:02:51. > :02:51.surprised if we see it again. Lots of you have been in touch online
:02:52. > :03:11.about this. Next, those high levels of air
:03:12. > :03:14.pollution we told you about yesterday. There has been another
:03:15. > :03:18.government warning today after some parts of England reached the worst
:03:19. > :03:24.level on the air quality scale. What is going on? We got a good view from
:03:25. > :03:31.high above the rooftops of London. Let's go over to Leah now. Over the
:03:32. > :03:35.past few days, London has been covered by a hazy smog. Today,
:03:36. > :03:39.things got worse, across Greater London and the South East, reaching
:03:40. > :03:43.the maximum of ten on the Government's scale, the highest
:03:44. > :03:47.level for air pollution. But it is not just here in London. The smog
:03:48. > :03:51.has been spreading across the country, hitting places like the
:03:52. > :03:56.north-west of England, the Midlands and north Wales. Joining me now is
:03:57. > :04:02.Benjamin Barritt, an air-quality scientist. Should we be worried? We
:04:03. > :04:05.should be worried, but not too alarmed. If you have asthma and you
:04:06. > :04:11.are outside, do not go running around too much. Carry your medicine
:04:12. > :04:16.with you at all times. It has been lingering in some areas, why is
:04:17. > :04:21.that? The dust in this pollution is so small, you cannot see it. It
:04:22. > :04:25.comes from all the vehicles, but it merges with the pollution from
:04:26. > :04:31.cities across Europe, which drifts across the UK. When was it this
:04:32. > :04:36.bad? In London we have episodes like this for five times a year, in the
:04:37. > :04:41.rest of the UK, maybe once or twice. We will have to wait until tomorrow,
:04:42. > :04:47.when we are expect in some wind from the Atlantic to blow this smog away.
:04:48. > :04:52.Back to you. That is all from Newsround today. There is loads more
:04:53. > :04:58.on the website, including a story about a cat that got stuck down the
:04:59. > :04:59.back of a sofa in a shop for five days. I will be back at ten to