Colorado has oil reserves, abundant natural gas and coal that make us a substantial contributor to the traditional domestic energy supply.

But oil has been a substantial contributor to the deficit.

This change was a substantial contributor to the difference in the projected costs of the designs.

Overproduction in recent years has led to this grape being a substantial contributor to the European wine lake problem.

He acted as a political adviser, campaign director or finance chairman, but always as a substantial contributor.

He has been a substantial financial contributor to the university, particularly the rowing program.

As the largest business on the island, it is also the largest employer of locals and a substantial contributor to the small island's economy.

He was a substantial contributor to many charities, always in a self-effacing, quiet way.

At least one other Skadden partner was a substantial contributor, as well.

The Institute is a substantial contributor to research on economies in transition.