Two canaries in the coal mine.

And also biggest coal mine here.

I worked in a coal mine dangerous.

Many workers were trapped in the coal mine.

Ice is the canary in the global coal mine.

He worked in the coal mine till it closed. And her?

This brings me to the second canary in the coal mine.

What used to be a town before the coal mine gave out.

In the very depths of a coal mine, or in a mansion on a hill.

Coal dust.

Barack Obama That's why we had to invest in clean coal technologies. If you own a coal mine, global warming is bad news for you.

I am the canary in the coal mine here as a warning to all of you.

But those of us living in environmental justice communities are the canary in the coal mine.

Mine! Mine! Mine!

But again, coal.

Massive coal reserves.

More coal doctor.

Coal. Coal turns out to be virtually the same stuff.

Mine! Mine!

They burned some coal.

The coal is burning.

It's gas. It's coal.

Not entirely unlike coal.

it's a hot coal.

Coal. Hint of silt.

From West Virginia comes accusations by the Carnegie coal company of Red influence on the United Mine Workers' strike.

Coal mines, that's what's in Scranton, Pennsylvania. nice, lovely, beautiful coal mines.

Further on, he came to understand the coal, the use of the coal, and he used coal, still, again, burning.

They substituted coal for oil.

Coal is not always black.

Coal consists mostly of carbon.

Coal is a fossil fuel.

If you burn coal, no.

Here's a piece of coal.

CT that killed seven people, a coal dust and methane explosion at the Upper Big Branch coal mine which killed 29 people, and a methane explosion in Deepwater Horizon that killed 11 people.

Do mine, Mommy! Mine, too!

Whereas a coal burning plant, a normal one gigawatt coal plant, burns 80 rail cars of coal a day, each car having 100 tons.

Mine

Mine.

Mine?

Mine.

Mine!

Mine!

Mine!

Mine!