1. Sustainability In our every deliberation we must consider the impact of our decisions on the next seven generations. Iroquois Confederacy

2. Sustainability Meeting the needs of the present without compromising the ability of future generations to meet their own needs. World Commission on Environment and Development, 1987

3. Sustainable Engineering The design of human and industrial systems to insure that humankind’s use of natural resources and cycles do not lead to diminished quality of life due either to losses in future economic opportunities or to adverse impacts on social conditions, human health and the environment. Mihelcic et al. 2003