澳大利亚科学家日前公布的一项研究结果显示，澳大利亚的农场主们今后可以通过播放袋鼠用脚拍击地面的录音来吓跑袋鼠，使庄稼和其他财产免遭这种野生动物的破坏。
Australian farmers could protect crops and property from MOBS of wild kangaroos by scaring them off with the thumping sound of the animals' own large feet on the ground, a new study said.
尽管如此，科学家至今还不能量化蜜蜂数量下降对庄稼或植物的直接影响，诺依曼则强调其中一些影响是定性的。
Nonetheless, scientists have been unable so far to quantify the direct impact of bee decline on crops or plants, and Neumann insisted that some of the impact was qualitative.
由于二氧化碳能促进光合作用，所以一些科学家估计大气中二氧化碳含量的增加会提高庄稼的产量并且促进森林生长。
Since carbon dioxide enhances photosynthesis, some scientists have calculated that higher concentrations in the atmosphere would increase the productivity of crops and forests.
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