1.   Because of the extreme cold, the Antarctic is a uniquely fragile environment.

2.   Among the more fragile environments are the remainders of the historic native American cultures in the United States.

3.   At considerable added expense, an artificial landfill island was formed to enable builders to tunnel under the sea and not disturb the fragile watery environment.

4.   Because of potential damage to the fragile environment, its waters now are off-limits to humans.

5.   But in the fragile environment surrounding energy merchant companies, the report noted, the death sparked wide speculation.

6.   Conservationists say that a fragile environment would be destroyed.

7.   In many ways, their personal conflict raises the soul-searching question of how Chile should balance its need for growth and the protection of its fragile environment.

8.   It is an extremely fragile environment, said Robert Buecher, a civil engineer who led the monitoring study and is a leading authority on cave climates.

9.   Its uncertain future underscores both the human failings that success can bring, and the difficulty of preserving a fragile folk environment hewn from a personal vision.

10.   Sauerbrey did so, she said, in the interests of a fragile local environment.