Coal Mining, Past and Present

Beside creating jobs, it's likely the early coal-mining industry added to the economy by

Choose the incorrect answer.

Conditions for coal miners in the early days were

One can infer from the passage that the coal-mining industry of the future will

It is likely mining-equipment companies invented sensors to control ventilation to

A fossil fuel that forms over millions of years from the remains of plants is

The early days of the industrial revolution, coal miners cut, drilled, blasted, and hauled coal

In the context of this passage, what does exhausted mean? (...they exhausted the seams)

Compared with manual mining methods, current techniques provide

From the passage, one can conclude that a drawback to the advances in coal-mining was

A good synonym for the word persisted is

To loosen coal from the rock, early miners used

The top producer of coal during the Industrial Revolution was

Coal mining techniques have improved over the last 50 years as a result of