Cairns, John Jr.2014-01-232014-01-232006http://hdl.handle.net/10919/25069Humankind, is just one of the 30 million species on the _stage or the planet. However, humans are markedly different from the other actors that are now or have previously been on the stage. Humans, in fact, affect the health and well being of the planet far more than any other species.en-USIn Copyrightbiosphereecological stageglobal warmingextinctionArticlehttp://www.johncairns.net/Commentaries/actor.pdf