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Res communis

Term
Environmental
Literal meaningA thing common to all
Pronunciationrayz kom-YOO-nis

A thing that belongs to everyone, such as the air and the sea. No one can own it.

Example

A public river is res communis. No one can privately claim it.

Case laws
  • M.C. Mehta v. Kamal Nath (1997), Supreme Court: the Court said that Roman law treated resources such as the air, rivers, sea and forests as common to all, and applied the public trust doctrine.
Exam tip

Asked with the public trust doctrine.

Memory trick

Common to all.

Key takeaway

Res communis is a resource shared by everyone.

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