They kill good trees to put out bad newspapers. – James G. Watt, quoted in Newsweek, 8 March 1982

The earth we abuse and the living things we kill will, in the end, take their revenge; for in exploiting their presence we are diminishing our future. – Marya Mannes, More in Anger, 1958

The sun, the moon and the stars would have disappeared long ago… had they happened to be within the reach of predatory human hands. – Havelock Ellis, The Dance of Life, 1923