The term eco-warrior is a self-description for an environmental activist that adopts a 'hands-on' effort to save a plot of land. In the UK it coined the term in the 1990s, a label that many people actively taking ecological direct action resisted, for philosophical reasons.
A common symbol of an eco-warrior is the Eco Warriors Flag.
Another use of the term refers to an environmental activist who engages in illegal activities, also known as eco-terrorism. However, an eco-warrior is also someone who utilizes the courts to halt, suspend, or otherwise derail a human activity that the activist believes adversely impacts the environment.
An eco-warrior can be someone who engages in an environmental organisation (e.g. Greenpeace) or an environmental company that delivers safekeeping or improvements for the environment (e.g. directly by selling environmental products).