(economics) A sector of a nation's economy that is illegally undeclared and undocumented due to cash payments or tax avoidance

A supporter of ecoanarchism.

plural of ecoanarchist

One who takes part in ecoactivism.

plural of ecoactivist

activism relating to the natural environment

(sociology) Concerning the economics of human sexuality.

(law) Abbreviation of economic. / (law) Abbreviation of economics. / (law) Abbreviation of economical. / (law) Abbreviation of economy.

(geography) A geographic approach that emphasizes human-environment relationships.

One who alarms others with environmental issues.