03/02/2018 Newsround

Hi, guys!

It's Naz here with

Saturday's Newsround.

Here's what's coming up.

The kids taking

on plastic pollution!

And we take a ride

on the world's longest zipwire!

First up, it's a massive

weekend for rugby fans -

the Six Nations begins -

let's start with a round up.

According to injured Wales

captain Sam Warburton,

it's going to be the closest

Six Nations ever.

Scotland will be hoping to get off

to a good start against Wales.

The Scots are one of the favourites

after playing really exciting rugby

in their last matches.

The other team some experts

think have a big chance

of winning, are Ireland.

They play France in Paris.

England play Italy tomorrow.

The women's Six Nations kicked off

last night with Wales

beating Scotland 18-17.

Wales were 18-5 up.

But two tries in the second half got

Scotland within a point.

But Wales held on - just!

And don't forget to head over

to Newsround online to check

out our guide to the Six Nations.

And for six things to look out

for in this year's men's

and women's tournaments.

Now Lady Gaga has

cancelled her UK tour.

It's because of illness.

She was going to perform in London

tomorrow and Manchester this week.

If you've got a ticket

you can get a refund.

She says she's really sorry

and sad she can't perform.

Get well soon, Gaga!

Millions of tonnes of plastic end up

in the world's oceans each

year - the Government recently

announced big plans to cut

all avoidable plastic waste by 2042.

But that's over 20 years away!

So what's being done now?

Martin's been to meet

some plastic-savvy kids.

We already pay 5p for

plastic carrier bags.

Some places are swapping plastic

straws for paper ones.

And certain shops are promising

to change their packaging.

The aim is to help cut down

the amount of plastic

we use and throw away.

But experts think there

is still so much more we can do.

Plastic bottles are a biggie

because around half of them

still aren't recycled.

And that's why I've come to this

school in Dorset to speak to some

kids who have come up with a plan.

Meet the Eco Crew.

We care about our planet.

So we've come up with an idea.

To stop pollution we want our school

to become a plastic free school.

If people put more and more plastic

into the ocean it will be

there for a very long time and more

plastic will go into fish bodies

and we won't be able to have any

fish any more.

What's the main goal

of the eco-club?

To see all of our coastlines with no

litter at all and to see animals

being able to swim freely.

We're off to see one of their ideas.

Look, a label up there, that means

that I can refill my bottle.

They've asked local shops to let

people fill up their own

water bottles for free.

Can we fill up our bottles?

It should mean fewer people buy

a plastic bottle which might

just get thrown away.

Thank you.

They've already got 20

places signed up so far.

Great work, guys!

If you're eating your lunch

whilst watching this,

you might want to put your

fork down for a bit.

Seriously,

this week's Big Question

is all about sick.

Yep, you heard me.

So the big question this week is...

Why does sick smell?

Well, Zaynab, that's

quite a question.

Vomit smells because

it has something

called butyric acid in it.

That's butyric - bew-ter-ric.

This is an acid made

from your gut to help you digest

food.

But when it isn't there,

it smells really, really bad.

If you wondered why

humans are so good at

picking this smell out, well,

it's really, really bad.

I mean, really strong.

Humans have learned

that the smell means you probably

don't want to touch or eat

the things that make the smell.

The smell makes humans stay safe.

And we went to find

out how bad it really

smells.

Here is a nice lunch.

Here it is after you've eaten it.

Sort of.

How does it smell?

Well, sort of like all

that food blended up,

really.

Now, let's add some

butyric acid to it.

And see what it's like when it's

gone into your stomach and

it comes back up!

Oh, wow.

That's awful.

So the reason why your vomit smells

really, really bad is because

it's got something called butyric

acid added to it by your body when

it digests it.

Next - this one may get

you feeling a little dizzy!

It's the longest zip wire

in the world...check it out!

Ready, steady...

Go!

This zip wire is in the United Arab

Emirates in the Middle East -

on top of a Mountain

right above the sea.

You can go super fast at 93 mph.

It's 2.8km long -

that's more than 28 football

pitches.

No wonder it's been given

the Guinness World Record

for the longest zip

wire in the world.

That was amazing.

I've never felt this way before.

It takes around three

minutes to get to the end.

Plenty time to enjoy this

great view...if you're

not scared, that is!

That's it from me -

Newsround's back at ten past one.