0:00:03 > 0:00:04Hi, I'm Ricky.
0:00:04 > 0:00:07It's Monday morning and this is Newsround.
0:00:07 > 0:00:10Coming up in the next few minutes.
0:00:10 > 0:00:12The new plan to cut pollution.
0:00:12 > 0:00:16And the world's most expensive keepy-uppys.
0:00:27 > 0:00:30One of the ways scientists hope to cut pollution
0:00:30 > 0:00:33is to stop people using oil, coal and petrol to power machines.
0:00:33 > 0:00:36We already know about using wind and solar power but BBC
0:00:36 > 0:00:40reporter Olivia Crellin went to investigate another
0:00:40 > 0:00:43option, hydrogen.
0:00:43 > 0:00:46I'm at the Priestley Centre in Guildford, where I've come
0:00:46 > 0:00:48to meet some young engineers of the future, who are using
0:00:48 > 0:00:53a gas called hydrogen to power their experiments.
0:00:53 > 0:00:56Stuart, tell me, what are you trying to find out with your experiment?
0:00:56 > 0:01:00We're trying to find out the temperature of the water
0:01:00 > 0:01:06and how big the waves are, using hydrogen battery as power.
0:01:06 > 0:01:07Fantastic.
0:01:07 > 0:01:10And, Stefan, what is so brilliant about using hydrogen?
0:01:10 > 0:01:12Well, it's really good for the environment.
0:01:12 > 0:01:17Like, diesel and petrol produce all kinds of nasty gases
0:01:17 > 0:01:20but hydrogen only produces water.
0:01:20 > 0:01:25The only downside is that we don't have much hydrogen and our ways
0:01:25 > 0:01:28of producing hydrogen aren't that great.
0:01:28 > 0:01:31So, what exactly is hydrogen, and where can it be found?
0:01:31 > 0:01:33Well, it's a gas.
0:01:33 > 0:01:38It has no colour and no smell but it's the most common
0:01:38 > 0:01:40gas in the universe.
0:01:40 > 0:01:44For example, our sun is almost all made up of hydrogen.
0:01:44 > 0:01:50However, there's hardly any hydrogen in the Earth's atmosphere
0:01:50 > 0:01:59because it's so light it just floats up into space.
0:01:59 > 0:02:01It can be found on Earth, though, in things like water
0:02:01 > 0:02:02and some types of fuel.
0:02:02 > 0:02:06Now, scientists have worked out ways of getting it out of those things.
0:02:06 > 0:02:09It can be used just like oil, gas and petrol to make
0:02:09 > 0:02:12energy to power things like our homes and cars.
0:02:12 > 0:02:19Scientists at Nasa even use hydrogen fuel to send
0:02:19 > 0:02:20their shuttles into space.
0:02:20 > 0:02:22So, while our young engineers' experiments are still under
0:02:22 > 0:02:24development, here's one way that hydrogen is being used now.
0:02:24 > 0:02:27And, Andrew, how does it all work?
0:02:27 > 0:02:29Well, this is actually an electric car.
0:02:29 > 0:02:31It's just that instead of using batteries as the power supply,
0:02:31 > 0:02:35it's using hydrogen.
0:02:35 > 0:02:37It's clean.
0:02:37 > 0:02:40The emissions coming out of the back are not those noxious fumes that
0:02:40 > 0:02:42you get with an ordinary diesel or petrol car.
0:02:42 > 0:02:43This is the future.
0:02:43 > 0:02:44So, are there any downsides, then?
0:02:44 > 0:02:46Why don't I just go and buy one tomorrow?
0:02:46 > 0:02:49Right now, this is a very new technology and the only
0:02:49 > 0:02:52downside I can think of is that there are only ten
0:02:52 > 0:02:53refuelling stations in the UK.
0:02:53 > 0:02:55OK, let's have a look at some of the weekend's
0:02:55 > 0:02:57top sports stories.
0:02:57 > 0:02:58Britain's Lewis Hamilton cruised to victory in
0:02:58 > 0:03:01the Italian Grand Prix yesterday, putting him in the lead
0:03:01 > 0:03:04position in the Championship for the first time this season.
0:03:04 > 0:03:08The win comes the day after Lewis broke the all-time record
0:03:08 > 0:03:13for pole position starts in Formula one races.
0:03:13 > 0:03:17And you might expect the world's most expensive football
0:03:17 > 0:03:19player to be pretty good at keepy-uppys.
0:03:19 > 0:03:21Well, have a look at this!
0:03:21 > 0:03:23Neymar and his Brazilian team mate Gabriel Jesus showed
0:03:23 > 0:03:25off their skills during training as their team prepared
0:03:25 > 0:03:30for a World Cup qualifying match against Colombia.
0:03:30 > 0:03:32Amazing!
0:03:32 > 0:03:35Do you know your cheeky monkeys from your wise monkeys,
0:03:35 > 0:03:38and when your smiley faces actually mean something else?
0:03:38 > 0:03:41Emojis mean different things all around the world,
0:03:41 > 0:03:44as Martin and I have been finding out.
0:03:44 > 0:03:46Watch this!
0:03:46 > 0:03:50Let's start with the basics - a smiley face.
0:03:50 > 0:03:52The meaning is quite obvious, isn't it?
0:03:52 > 0:03:54Whatever we're talking about is making me grin.
0:03:54 > 0:03:55I'm happy, we're smiley.
0:03:55 > 0:03:58Not always, you see, because in China some people think
0:03:58 > 0:04:00the complete opposite.
0:04:00 > 0:04:04They think this face is sarcastic, so using it could be quite mean.
0:04:04 > 0:04:10"You're great."
0:04:12 > 0:04:13All right, Ricky.
0:04:13 > 0:04:14Tell me what you really think!
0:04:14 > 0:04:17What about this one?
0:04:17 > 0:04:17Is it a prayer?
0:04:17 > 0:04:19Is it a high five?
0:04:19 > 0:04:21Actually, it is originally from Japan and it means either
0:04:21 > 0:04:24please or thank you.
0:04:28 > 0:04:30Oh, thank you, Martin.
0:04:30 > 0:04:34But, actually, it's a shirt.
0:04:34 > 0:04:37I use this cheeky looking guy when I'm trying to be funny
0:04:37 > 0:04:38or I'm a bit embarrassed.
0:04:38 > 0:04:40But this cheeky monkey is actually meant
0:04:40 > 0:04:44to be wise and it comes from a Japanese legend.
0:04:44 > 0:04:47The three wise monkeys cover up different parts of their face
0:04:47 > 0:04:54to show that they see no evil, hear no evil and speak no evil.
0:04:54 > 0:04:55What about this one?
0:04:55 > 0:04:59For most of us here in the UK, this one is tears of joy.
0:04:59 > 0:05:03The face is laughing so much it's actually crying.
0:05:03 > 0:05:08But in some cultures, this face means something
0:05:08 > 0:05:10completely different.
0:05:10 > 0:05:14It's actually a face of someone who is quite upset.
0:05:14 > 0:05:15Oh, no, Ricky!
0:05:15 > 0:05:19Ricky, are you OK?
0:05:19 > 0:05:20Why are you crying?
0:05:20 > 0:05:21Martin, I'm totally fine.
0:05:21 > 0:05:22I was just laughing.
0:05:22 > 0:05:23Oh!
0:05:23 > 0:05:25I thought you were crying.
0:05:25 > 0:05:27I've got to go, because I've got to present the show.
0:05:27 > 0:05:30OK, well, have a good show and before you go, take this.
0:05:30 > 0:05:31OK.
0:05:31 > 0:05:32Bye.
0:05:32 > 0:05:34Why would he give me a poo?
0:05:34 > 0:05:41Because sending a poo actually means good luck in Japan.
0:05:44 > 0:05:48That's all from me, Newsround's back with Ayshah
0:05:48 > 0:05:52later this afternoon.
0:05:52 > 0:05:56If you're back at school today, enjoy!