The amount of oil that may become available for use is called oil

Chemical reactions triggered by _______ transform organic material into hydrocarbons.

Energy resources derived from natural organic materials are called

Which of the following problems is associated with the burning of coal?

Which of the following energy sources does not produce carbon dioxide?

Solar energy stored in material such as wood, grain, sugar, and municipal waste is called __________.

What type of energy is derived from heated groundwater?

The world has the least amount of which of the following fuel types..

The best type of coal in terms of purity is

The main method of natural gas transportation is:

CNG stands for?

Copper is mostly used in

Gold, silver, copper and carbon are examples of

Due to its high heat exchange rate, copper is used in

Which metallic mineral is used in X-ray machines to prevent from dangerous rays?

Largest producer of oil in Muslim World is

Which metallic mineral is used to coat the objects to prevent from rusting?

Ancient people used to make the objects by

It was one of the first metals ever to be discovered by early people