Environmental security, a relatively new and still somewhat contentious con
cept, may be defined as the intersection of environmental and national secu
rity considerations at a national policy level. It may be understood as a r
esult of several important trends. One, of course, is the breakdown of the
bipolar geopolitical structure that characterized the cold war. A second, l
ess visible to many in the policy community, is the shift of environment fr
om compliance and remediation to strategic for society. This process is occ
urring at many different scales, from implementation of Design for Environm
ent methodologies within firms, to integration of environmental and trade c
onsiderations in the World Trade Organization (WTO). Taken together, these
trends suggest that environmental security may be an important evolution of
national state and international policy systems. If this is to occur, howe
ver, the concept must be defined with sufficient rigor to support an operat
ional program.