Sentence examples for the principal source of from inspiring English sources

The principal source of his misery is his own side.

Bastnasite, a fluorocarbonate, is the principal source of rare earths.

The North Sea has been the principal source of airlift weather trouble.

He also wants Iraq to secure control of the principal source of Arab wealth: oil.

But the principal source of threats against her life was linked to Agua Zarca.

Harris suggested that children's peers might be the principal source of this environmental input.

During the Sarkozy years, the principal source of anxiety was immigration — in particular, Muslim immigration.

Smoking is in fact the principal source of indoor air pollution.

Natural gas is already the principal source of heat in half of American households.

In Britain, Canada and Sweden, among others, the principal source of revenue is general taxation.

The classical economist laid great stress on frugality as the principal source of capital accumulation.