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【题目】根据材料,完成下列问题。

材料一:中国通过卫星遥感图片执法检查,就耕地保护等土地管理问题对县级以上的地方人民政府主要负责人实施问责。凡是地方违法违规土地面积占当年新增建设用地面积15%以上者,将被追究责任,包括主要负责人记大过、降级或撤职。

材料二:目前我国耕地面积只有18.26亿亩,人均耕地面积仅有1.43亩,不到世界平均水平的40%。近几年来,全国耕地面积缩小1亿多亩。从耕地的质量来看我国耕地高产稳产田仅占1/3。

(1)简要分析我国耕地减少的主要原因。

(2)根据材料,提出我国保护现有耕地的主要措施。

【答案】

(1)随着人口增加,住房用地增加;随着经济发展,工业、交通用地增加;不合理的土地利用方式造成土地退化;流水侵蚀和风沙危害造成耕地减少等。

(2)数量保护:严格控制耕地转为非耕地;国家实行耕地补偿制度;国家实行基本农田保护制度;推进土地开发、复垦、整理。质量保护:国家制定耕地质量保护措施,如:防止水土流失、耕地沙化、盐碱化、贫瘠化等。

【解析】

(1)题,我国耕地减少的主要原因,可以从工业发展、侵蚀和风沙危害等方面回答。

(2)题,我国保护现有耕地的主要措施,可以从实行耕地补偿制度、防止水土流失等方面回答。

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