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Preface
The world we live in is made up of innumerable particles: elementary particles, atoms and molecules, and a multitude of substances with different and diverse properties: natural and synthetic substances, organic and inorganic compounds, and pure and composite materials. All of these are found in outer space and on Earth, in the air, in water sources, and on land, as well as in plants (“flora”) and animals (“fauna”).
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These particles and substances are constantly moving and changing their states and shapes, decomposing, and being created by means of a variety of physical processes and chemical reactions—as part of #biogeochemical cycles, while absorbing and emitting energy in various forms.
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