Week1 7-12句原文

7.     But those life support systems that keep us alive even if we live in a city are produced by healthy ecosystems and none of those ecosystems will run well without insects. 

8.     Insects rely on weeds and native plants for food and shelter. 

9.     And both of those are dwindling in the United States as manicured lawns and single crop agriculture spread across the landscape. 

10.     But entomologist Doug Ptolemy says more and more Americans are following his lead by letting their gardens go wild. 

11.     A lot of homeowners are interested in doing this: how can I increase the ecological integrity of my landscape. 

12.     How can I get my landscape to contribute to local ecosystems instead of degrading them? 

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