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A complex mixture of molecules produced by the decay of dead plant matter. It is a major...

A standardized method used to assess the environmental aspects and potential impacts of a...

Chemical compound added to a fuel and lubricant to enhance its properties.

DNA, packaged in chromosomes, is a long molecule in the shape of a double helix. It contains all...

Describes an organism or microorganism that requires — or has the ability to use — oxygen, which...

The IAEA was set up in 1957 within the United Nations family. It works for the safe, secure and...

Alkylation is one of the main reactions used in the petrochemical industry. It increases the...

Type of refinery that upgrades heavy, high-sulfur (sour) crude oil into light, low-sulfur...

Treating is all of the refining processes intended to remove unwanted compounds (contaminants)...

Describes an organism or microorganism that requires an environment without air and, by extension...