30/08/2016 Newsround

Hi, I'm Leah, this is Newsround and here's what's coming

up on the show today:

How birds could teach drones to fly.

And find out what Pokemon burgers look like.

This is Newsround.

So our top story this Tuesday - air pollution in cities hasn't

improved enough over the last 20 years.

A new report by the Royal Geographical Society says

pollution caused by cars, buses and lorries makes the air

in some cities bad enough that it could make some people ill.

The Government says it's trying to reduce air pollution

but experts say more needs to be done to encourage people

to walk or cycle.

Now, ever wondered how birds manage to fly in even the strongest winds?

Well, a team of scientists in the US has created a special wind tunnel

to help them find out.

BBC science reporter Victoria Gill went to see it.

Filmed in super-slow motion.

Scientists have a lot to learn from this little lovebird.

How such tiny birds fly smoothly through gusty air

is still a mystery.

So scientists at Stanford University have built this.

It is a wind tunnel for birds.

We worked for four years to design this

and build this.

It was put together specifically to study how birds fly.

We can use the best possible techniques.

Those techniques include cameras that film in extreme slow motion,

capturing tiny wing adjustments that keep the birds steady in the wind.

It is the latest ambitious experiment in a lab here in

California that is dedicated to unravelling the secrets of flight.

Diana works with these birds every day.

She uses clicker training and food rewards

so they will fly to wherever she points her finger.

The ultimate aim is the design of tiny flying robots like these.

By copying what birds do, engineers can build

much smaller, steadier robots that they could then send out

after a disaster to search for people who might be trapped.

So these scientists will aim to create robotic copies

of what nature has perfected over millions of years.

Sport now, and Manchester United's Wayne Rooney will stay

on as captain for England.

New England manager Sam Allardyce says it was an "easy decision"

because he's "hugely respected".

And Big Sam's number one goalie, Joe Hart, has moved a step closer

to joining Italian side Torino on loan for a season.

He's fallen out of favour at Manchester City and he's

due to have a medical in Italy later today.

Now to the incredible Australian teenager whose become the youngest

person ever to fly by himself around the world in a single engine

aircraft and this how he did it.

54 days after taking off, Lachlan Smart arrived back home.

Crowds of people welcomed him at the airport

on the Sunshine Coast, eastern Australia.

It was from here on July 4th that the 18-year-old took off

in his single-engine aircraft.

And he now returns home a world record breaker,

almost a year younger than the previous record holder.

It's so amazing to finally be back here in my home town

in the Sunshine Coast and landing back on the runway

that I did my initial flight training on was just very special.

Lachlan travelled more than 24,000 air miles and stopped

at 24 different airfields around the world.

Starting on the Sunshine Coast in Australia, his first stop

was the island of Fiji.

He then made stops in the US, Canada and Europe, where he took

a week's break and visited family in London.

He continued his journey on to North Africa, the Middle East

and through to South East Asia, where he had some

communication problems.

But undefeated, he carried on his journey back home to Australia.

As well as breaking the record, he hopes his epic journey gets

other people motivated.

When we are told we are too young, you are not good enough,

it's too hard, when with enough hard work you can get there and hopefully

I've started to prove that as an 18-year-old.

Two and a half years planning this trip around the world

and now having completed it.

After many hours of hard work, I'm trying

to prove the sky is not the limit so, yeah, dream big.

And finally, yes, it's breakfast but we promised you this one

at the top.

This is what Pokemon burgers look like.

A restaurant in Sydney, Australia cooked up the creations.

Look, that's Pikachu.

There are also veggie options and it got lots of fans excited -

there were queues around the block.

That's all from me.

Newsround's back right here in about half an hour.