The basis of 'organic 'chemistry' is a group of four elements: Nitrogen, Oxygen, Carbon and Hydrogen.

These four elements can be combined in a nearly infinite number of configurations to produce fuels, plastics, even food.

These four elements form a major part of the planet Earth, and are subjected to enormous temperature and pressure.

At some depth, there is always the right combination of heat and temperature to produce crude oil.

At the same time, other areas will have conditions that are just right for the production of natural gas.

And no, 'organic chemistry' does not mean pesticide-free alfalfa sprouts.