26/10/2016 Newsround

Hi, guys.

Martin here with your afternoon Newsround.

First up, the timer is close to pinging

on the Great British Bake Off.

Tonight sees the grand finale on BBC One.

So who will be crowned the series winner?

Well, with this year's Royal Theme, Andrew, Jane and Candice will be

getting their whisking spoons and hoping it's them.

Well, Junior Bake Off champ Amari dropped into Newsround HQ to give

us her take on the final three!

I'm jumping between Candice and Jane.

They're all good bakers, but I think it will be one of them.

You have to be a good baker.

But it's also the personality and your creative skills

to go with it as well.

You just need to be calm.

I've learnt a few tips about baking and I would like to try

and make what they've made.

Now, we asked who you think should be crowned Bake Off Champion.

Chloe says...

"Candice should win.

I loved her gingerbread pub and her marzipan peacock."

Rory wants Andrew to win because he loved his churros.

Isabella is in Team Jane "because she pushes herself".

And Lucy just says, "It's too hard to decide".

I know how you feel, Lucy.

Thanks for all your comments, guys!

Now, when it comes to pollution, you might think of things down

here on the ground like car fumes and factories, but to find

out how clean the air actually is in our cities,

scientists are taking to the skies.

And I went along with them.

This is one of the most advanced scientific aircraft in the world.

It is this plane's job to measure the amount of air pollution

there is in cities across the UK, and I'm about to hop on board

from East Midlands to Manchester to see how it works.

On the outside, it might look like an ordinary aeroplane,

but on the inside, it's a high-tech chemistry lab.

On board, I spoke to one of the lead scientists to find out more.

James, what are we doing on this aircraft today?

We're flying off the coast of Liverpool and Manchester.

The wind is currently blowing all the pollution that gets emitted

from cars and factories and things.

It's blowing it over the sea and we're crossing that plume

of pollution, trying to measure how much is in it.

Air pollution is bad for us.

What we're doing here is trying to understand better where this

pollution is coming from, how much is being emitted and then,

going forward, how to better inform people as to how we can improve

the air quality in our cities.

James, how unique is this aircraft in what it does?

It's the only one in the UK.

It's the largest one in Europe.

And it's pretty much state-of-the-art.

Compared to other aircraft around the world, it is

pretty much the best.

We've got a few bits of equipment out hanging beneath the wings that

measure things like clouds as we go through them.

And we've also got quite a lot of equipment inside the aircraft cabin.

The air is being sucked through and our instruments

are providing a measurement of the different air pollutants.

There is a lot of high-tech equipment being flown around

in this aircraft cabin.

Now, Manchester United face Manchester City in a League Cup

derby match later on.

But here's the real Match of the Day.

Two teams of robots competing in the final of

the RoboCup Challenge in Beijing, in China.

Check it out.

Welcome to the RoboCup Challenge in Beijing, China.

Four teams competed in the tournaments and robots

from Australia and the USA went head-to-head in the grand final.

They're not controlled by humans but, instead,

the robots can connect to a wireless network and can

communicate with each other.

They make decisions by themselves during the match.

Each team can have up to five robots on the field and substitutions

are allowed if a robot overheats or gets injured.

Final score - USA 7, Australia 3.

Well played!

Now, after getting in hot water when he complained about fans

screaming too much at a concert in Manchester this week,

Justin Bieber has been keeping it cool in the ice rink.

The pop star dropped in to join training at the Manchester

Storm Ice Hockey team.

And he wasn't just making up the numbers, check

out his goalscoring skills!

Amazing.

That's all from me.

Newsround's back at 7:40am tomorrow with Leah.