These new iron machines needed coal, rather than charcoal, to produce the steam to drive them.

Rod, we've got to have coal; for cast iron or steel we need coal.

It needed black coal to keep it burning.

The US, however, has oodles of cheap gas and no longer needs very much coal, especially if they also revive nuclear in a rational way.

Tens of millions of city dwellers needed coal to heat their homes.

We'll also need coal or charcoal, and some oil.

A yellow sticker on the front read, 'People will always need coal.'

It widened the opposition movement to the workers and frightened the regime, which needed coal from the mine to keep supplying electricity.

More than ever, the Duarchy needed iron and coal.

In the 1810s, experiments were made with puddling, but this proved unsatisfactory, as it needed coal of which Sweden had none.