Chemical substances which are employed during a riot in order to control or disperse the rioting parties.

A form of violent crowd behavior which expresses the emotional release of resentments and prejudices, usually relevant to grievances toward the social system.

Organisms, biological agents, or biologically-derived agents used strategically for their positive or adverse effect on the physiology and/or reproductive health of other organisms.

Use of naturally-occuring or genetically-engineered organisms to reduce or eliminate populations of pests.

Unlawful act of taking property.