When acid comes in contact with metal, it causes a chemical reaction.

Miss Williams is challenging the call on the left baseline. The ball was called in.

Breath of Fresh Air

An airship is lighter than air.

To live without air is impossible.

Without air, nothing could live.

There is no air in space.

The picture was taken from the air.

There is no air on the moon.

Let in some fresh air.

Let some fresh air in.

There's no air on the moon.

Tom wanted some fresh air.

Let some fresh air in.

Air Quality in China A Snapshot

We would die without air.

The picture was taken from the air.

She went outside to get a breath of fresh air.

I feel lighter than air.

Without air we would die.

Without air we would die.

I just need some air.

The tire needs air.

We need air support!

There's no air in this room.

But for New Zealand, even getting to the Olympics in artistic gymnastics is already a breakthrough.

The director of sports who's responsible for getting her into the program asks her to come out of class.

Pollution remains a grave challenge as well.

The overnight temperature will be 10... 12º С.

This district is notorious for air pollution.

This village is free from air pollution.

This tire needs some air.

Men can not exist without air.

This dust is impossible to filter from the air.

There is no polluted air in our city.

Industrial emissions cause air pollution.

Water is 800 times heavier than air.

Plants can't grow without air.

I just need some fresh air.

Humans can't live without air.

A new social contract will not appear out of thin air.

Air pollution measuring station (right), Šmizla statue (left).

Air pollution has been a public enemy to millions of Iranians for years.

Aerial shot of Rizal Park rally.

Arial view of Tbilisi, Georgia.