It could go a long way, he says, to shifting consumers as well as farmers towards a more sustainable system of agriculture.

他说，要让消费者和农民都转向更加可持续的农业体系，还有很长的路要走。

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What keeps this vast system clean is a web of earth, plants and animals; when water cannot be in touch with these it is no longer a sustainable and healthy system.

而能保持这一庞大水系统洁净的则是由泥土、植物、动物组成的网络。当水不接触它们时，这个系统就不能再保持正常了。

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A system based on tactics without strategy leads to shooting in the dark—you might get something done, but it doesn’t become sustainable or provide you with a path to continue on.

拥有战术而没有战略的方法，就像是在黑夜里乱开枪，你也许会得到一些猎物，但是并不能够持续收获。 这种方法也不会提供给你一个继续收获的方法。

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He says the global economy must change to a sustainable system now before social issues and ecological degradation become overwhelming.

VOA: standard.2010.01.23

However one in particular is leading th industry by trying to create a completely sustainable system with zero impact.

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And second, accountability: It required clear record-keeping to ensure the vaccines were getting to children and to establish a sustainable delivery system.

FORBES: With Vaccines, Bill Gates Changes The World Again

But Megan Kintzer, director of development at the Rodale Institute, an organic farm and research center in Pennsylvania, says that organic farming is a more sustainable system.

CNN: Study: Organic yields 25% lower than conventional farming