Maize, commonly known as corn, is a large grain plant domesticated by indigenous peoples in Mexico. The six major types of corn are dent corn, flint corn, pod corn, popcorn, flour corn, and sweet corn.
Petroleum refining processes are the chemical engineering processes and other facilities used in petroleum refineries to transform crude oil into useful products such as LPG, gasoline or petrol, kerosene, diesel oil and fuel oils.
A solar cell, or photovoltaic cell, is an electrical device that converts the energy of light directly into electricity by the photovoltaic effect, which is a physical and chemical phenomenon.
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