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ID number:715741
Evaluation:
Published: 01.12.1996.
Language: English
Level: Secondary school
Literature: n/a
References: Not used
Extract

Americans invest a great deal of effort in monitoring and cultivating their physical, financial, and human capital. The environment and the ecosystem, on the other hand, are just beginning to receive attention. Over the last three decades, there has been a growing recognition that pollution poses a serious threat to human population and global ecosystems. One realization is that the ozone layer is weakening. In fact, estimates show that the ozone hole is as big as North America, 9 million square miles. The ozone is a shield that absorbs and protects the earth from ultra-violet rays. …

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