crude

1 - Considering the present situation, no one can expect there to be a considerable fall in the prices of the crude oil.

2 - The earliest physical evidence of culture is crude stone tools produced in East Africa over two million years ago.

3 - Iran makes its money by selling crude oil to other countries.

4 - Nigeria is heavily dependent on the export of crude oil to finance industrial development.

5 - Human consumption of fossil fuels is expected to fully deplete the Earth's crude oil reserves by the year 2060.