The northern arid land of China is economically backward and ecologically fragile.

我国北方干旱地区，是经济落后、生态环境脆弱区域。

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The red soil hilly region of Central Hunan Province is one of the most ecologically fragile regions in China.

湘中红壤丘陵区是中国非常脆弱的生态系统之一。

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It might happen again, but new oil sources are found in increasingly costly places like deep water and perhaps the ecologically fragile Arctic.

FORBES: The Carbon Bubble

Given this record, it is hardly surprising that the increasingly influential environmental movement in the USSR is alarmed at the prospect of still greater energy exploitation in ecologically fragile areas like the Caspian Sea, the Bering Sea and the Siberian permafrost.

CENTERFORSECURITYPOLICY: Center for Security Policy | Post-Mortem On The Helsinki Summit: Soviet Cooperation Like This We Can��t Afford