The Four Elements

Air.

Earth,

Fire.

Water.

The sources in nature's wealth.

The state of man's well-being depends on himself,

and how well he can use that wealth.

Harness water with a dam in Nevada,

and it becomes...

power.

The force of the water transformed by dynamos

into the power of electricity.

Power that has changed the face of the United States,

generating for its people an abundance of new goods and services.

Power for the homes,

the railroads,

the factories.

A coal mine in West Virginia.

Through technological advance,

each worker's ability to produce has been increased,

while his workload has been lightened, and his work day shortened.

A mill in Pennsylvania,

where fire transforms the coal info coke.

The coke, fused with ore, becomes...

steel.