Due to fewer rainfall, lean soil, serious soil and water loss and the long term negative effect of human activity, the ecological environment in hilly semi arid area is being degraded.

低山丘陵半干旱区气候干旱、土地贫瘠、水土流失严重，加上人类活动的长期负面影响，使得该地区生态环境不断恶化。

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Soil tillage changes the soil environment. But the effect of long-term soil tillage on kernel quality of winter wheat needs further research.

土壤耕作可改变土壤环境，但耕作方式对冬小麦品质的长期影响仍有待于进一步研究。

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Even though both agencies declared D5 did not pose a threat to humans, they believed it was entering the environment in quantities and conditions that could have a long-term harmful effect on biodiversity.

FORBES: Scientists Recommend Canadian Regulation Be More Reasonable; Government Listens