Laser-plasma chemistry has become a rapidly rising field in science and technology. Current interest in the process
called laser-induced dielectric breakdown, while the phenomenon is called a laser spark, is mainly motivated by a rapidly
growing area of their applications in the study of chemical reactions and their utilization in chemical analysis. A
systematic study of chemical reactions initiated by laser sparks is based on finding simple reproducible conditions for the
formation of small biomolecules, the preparation of well-defined fine particles, laser ignition of fuel mixtures, and so on.
Research on LIDB-initiated chemical reactions has been triggered again recently by the advent of nanotechnologies. The
systematic part of this contribution describes the laser-plasma-chemical behaviour of simple inorganic gases and their
mixtures, and metallic and organic vapours. The strongest motivation for the studying laser-spark chemistry comes from
the planetary sciences, where laser sparks have been used as a laboratory model of high-energy-density phenomena (e.g.,
cometary impact, lightning) in planetary atmospheres. This contribution is primarily focused on the laser-plasma
chemistry of homogeneous gases, but chemical consequences of LIDB in liquids (laser cavitation) and on liquid-solid
and gas-solid interfaces are also briefly reviewed. Particular processes responsible for the chemical action of a laser
spark are identified and discussed.