1.   The second is to gain the knowledge and experience to maintain humans within equilibrium in a closed ecological system.

2.   -- The water that flows from the chain of lakes near Orlando south to Florida Bay is all one ecological system.

3.   But critics maintain that too many sites are left unfinished and that ecological systems fed by waterways, now buried under debris, are changed forever.

4.   But not everyone likes the strategies he chooses to try to save ecological systems.

5.   It has the destruction of an ecological system, along with claims that the people are being exposed to toxic chemicals, which environmentalists are seizing upon.

6.   Jackson writes as if culture itself were an ecological system, an environment in which art, politics, philosophy and other spheres of information are constantly interacting.

7.   Rising temperatures, heavier rains and longer droughts would shake up ecological systems that influence human well-being.

8.   The biggest problem in his soil-free paradise, as in any enclosed ecological system, is bugs.

9.   The nation was also found to harbor a more varied array of ecological systems than any other large country.

10.   The models and games being created are attempts to understand ecological systems, evolutionary development and genetic influence.