It Happened in Montana. The Hebgen Lake magnitude 7.5 earthquake, which occurred on August 18, 1959, was the largest earthquake in Montana and the 14th largest earthquake in the contiguous U.S. in historic times (Stover and Coffman, 1993). The earthquake caused 29 fatalities and about $11million in damage to highways and timber.
An Environmental Policy is..... A statement by the organization of its intentions and principles in relation to its overall environmental performance which provides a framework for action and for the setting of its environmental objectives and targets.. (Definition quoted from ISO 14001).
The list can be shortened into a tight definition. Environmental sustainability is the rates of renewable resource harvest, pollution creation, and non-renewable resource depletion that can be continued indefinitely.