Meaning of ecohazard

ec•o•haz•ard

Pronunciation: (ek'ō-haz"urd, ē'kō-), [key]
— n.
  1. any substance or activity that poses a threat to a habitat or an environment: Off-the-road motorcycling is an ecohazard to fragile desert habitats.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.