0:00:11 > 0:00:14Hi, I'm Ricky, and welcome to our new-look set here
0:00:14 > 0:00:17on Newsround on Monday morning.
0:00:17 > 0:00:19One of the ways scientists hope to cut pollution
0:00:19 > 0:00:22is to stop people using oil, coal and petrol to power machines.
0:00:22 > 0:00:25We already know about using wind and solar power but BBC
0:00:25 > 0:00:29reporter Olivia Crellin went to investigate another option -
0:00:29 > 0:00:33hydrogen.
0:00:33 > 0:00:36I'm at the Priestley Centre in Guildford, where I've come
0:00:36 > 0:00:38to meet some young engineers of the future, who are using
0:00:38 > 0:00:42a gas called hydrogen to power their experiments.
0:00:42 > 0:00:46Stuart, tell me, what are you trying to find out with your experiment?
0:00:46 > 0:00:49We're trying to find out the temperature of the water
0:00:49 > 0:00:54and how big the waves are, using hydrogen battery as power.
0:00:54 > 0:00:56Fantastic.
0:00:56 > 0:00:59And, Stefan, what is so brilliant about using hydrogen?
0:00:59 > 0:01:01Well, it's really good for the environment.
0:01:01 > 0:01:06Like, diesel and petrol produce all kinds of nasty gases
0:01:06 > 0:01:09but hydrogen only produces water.
0:01:09 > 0:01:13The only downside is that we don't have much hydrogen and our ways
0:01:13 > 0:01:17of producing hydrogen aren't that great.
0:01:17 > 0:01:20So, what exactly is hydrogen, and where can it be found?
0:01:20 > 0:01:22Well, it's a gas.
0:01:22 > 0:01:26It has no colour and no smell but it's the most common
0:01:26 > 0:01:29gas in the universe.
0:01:29 > 0:01:34For example, our sun is almost all made up of hydrogen.
0:01:34 > 0:01:37However, there's hardly any hydrogen in the Earth's atmosphere
0:01:37 > 0:01:41because it's so light it just floats up into space.
0:01:41 > 0:01:44It can be found on Earth, though, in things like water
0:01:44 > 0:01:47and some types of fuel.
0:01:47 > 0:01:50Now, scientists have worked out ways of getting it out of those things.
0:01:50 > 0:01:53It can be used just like oil, gas and petrol to make
0:01:53 > 0:01:56energy to power things like our homes and cars.
0:01:56 > 0:01:59Scientists at Nasa even use hydrogen fuel to send
0:01:59 > 0:02:02their shuttles into space.
0:02:02 > 0:02:05So, while our young engineers' experiments are still under
0:02:05 > 0:02:10development, here's one way that hydrogen is being used now.
0:02:10 > 0:02:15And, Andrew, how does it all work?
0:02:15 > 0:02:18Well, this is actually an electric car.
0:02:18 > 0:02:21It's just that instead of using batteries as the power supply,
0:02:21 > 0:02:23it's using hydrogen.
0:02:23 > 0:02:24It's clean.
0:02:24 > 0:02:27The emissions coming out of the back are not those noxious fumes that
0:02:27 > 0:02:29you get with an ordinary diesel or petrol car.
0:02:29 > 0:02:30This is the future.
0:02:30 > 0:02:32So, are there any downsides, then?
0:02:32 > 0:02:33Why don't I just go and buy one tomorrow?
0:02:33 > 0:02:36Right now, this is a very new technology and the only
0:02:36 > 0:02:39downside I can think of is that there are only ten
0:02:39 > 0:02:42refuelling stations in the UK.
0:02:42 > 0:02:44Do you know your cheeky monkeys from your wise monkeys,
0:02:44 > 0:02:47and when your smiley faces actually mean something else?
0:02:47 > 0:02:49Emojis mean different things all around the world,
0:02:49 > 0:02:52as Martin and I have been finding out.
0:02:52 > 0:02:56Watch this...
0:02:56 > 0:02:58Let's start with the basics - a smiley face.
0:02:58 > 0:03:00The meaning is quite obvious, isn't it?
0:03:00 > 0:03:03Whatever we're talking about is making me grin.
0:03:03 > 0:03:06I'm happy, we're smiley.
0:03:06 > 0:03:08Not always, you see, because in China some people think
0:03:08 > 0:03:10the complete opposite.
0:03:10 > 0:03:13They think this face is sarcastic, so using it could be quite mean.
0:03:13 > 0:03:20"You're great."
0:03:20 > 0:03:21All right, Ricky.
0:03:21 > 0:03:25Tell me what you really think!
0:03:25 > 0:03:26What about this one?
0:03:26 > 0:03:27Is it a prayer?
0:03:27 > 0:03:28Is it a high five?
0:03:28 > 0:03:31Actually, it is originally from Japan and it means either
0:03:31 > 0:03:37please or thank you.
0:03:37 > 0:03:40Oh, thank you, Martin.
0:03:40 > 0:03:43But, actually, it's a shirt.
0:03:43 > 0:03:46I use this cheeky looking guy when I'm trying to be funny
0:03:46 > 0:03:48or I'm a bit embarrassed.
0:03:48 > 0:03:50But this cheeky monkey is actually meant
0:03:50 > 0:03:53to be wise and it comes from a Japanese legend.
0:03:53 > 0:03:56The three wise monkeys cover up different parts of their face
0:03:56 > 0:03:59to show that they see no evil, hear no evil and speak no evil.
0:03:59 > 0:04:05What about this one?
0:04:05 > 0:04:08For most of us here in the UK, this one is tears of joy.
0:04:08 > 0:04:11The face is laughing so much it's actually crying.
0:04:11 > 0:04:15But in some cultures, this face mean something
0:04:20 > 0:04:22But in some cultures, this face means something
0:04:22 > 0:04:23completely different.
0:04:23 > 0:04:25It's actually a face of someone who is quite upset.
0:04:25 > 0:04:26Oh, no, Ricky!
0:04:26 > 0:04:28Ricky, are you OK?
0:04:28 > 0:04:30Why are you crying?
0:04:30 > 0:04:33Martin, I'm totally fine.
0:04:33 > 0:04:34I was just laughing.
0:04:34 > 0:04:35Oh!
0:04:35 > 0:04:36I thought you were crying.
0:04:36 > 0:04:39I've got to go, because I've got to present the show.
0:04:39 > 0:04:42OK, well, have a good show and before you go, take this.
0:04:42 > 0:04:43OK.
0:04:43 > 0:04:43Bye.
0:04:43 > 0:04:45Why would he give me a poo?
0:04:45 > 0:04:52Because sending a poo actually means good luck in Japan.
0:04:52 > 0:04:54That's all from me.
0:04:54 > 0:04:58Newsround's back right here in about half an hour.