The property tax is a critical source of revenue for the city.
Television production is expensive, and stations say retransmission deals create a critical source of revenue.
With the pipeline open, a critical source of oil is flowing again to the global market.
The Diamond Mountain tour had been a critical source of hard currency for the North.
Too much control can be a bad thing, particularly when innovation is a critical source of competitive advantage.
The loan market, although it receives little publicity, is a critical source of financing for corporate borrowers of all stripes.
Canadian and other foreign banks have been a critical source of capital for United States lenders since the financial crisis.
Lacking that critical source of funding, banks pulled back and credit tightened, worsening the problems in the economy.
In 1999, when India began spending seriously on equipment, Israel became a critical source, not least because it had specialized in upgrading Russian equipment.
"Meanwhile, our drought-parched public lands are deprived of a critical source of water that is instead being bottled for profit".
Climate change may contribute to the decline of the white bark pine nut, a critical source of food, as it has for the Yellowstone grizzlies.
