Which of the following energy resources might replace dwindling petroleum supplies one day? a) coal and natural gas b) tar sands and uranium c) oil shale and tar sands d) wind and coal

A) coal and natural gas

Petroleum or crude oil is a source of fuel. It found under the ground or sea. It is naturally occurring, yellowish black liquid. It is obtained by the drilling or dwindling process. It is refined and separated by the method of fraction distillation. The petroleum can be replaced by coal and natural gas as a source of energy.

colorless gas, exhibiting a blue glow when placed in an electric field

b) solid

its a type of rock