Source : major automobile exhaust ( mainly in the combustion of gasoline is not sufficient , if the state open parking engines , coal burning reclamation , combustion of organic compounds ) 主要来源：汽车尾气(主要在汽油燃烧不充分时，如停车状态开发动机、燃煤、农垦烧荒、有机物燃烧) 。
3.
For the limited soil resources , we should improve the fertility by the way of reclaiming the lands with high fertility , green manure or burning the grass on waste land , reclaiming sandy lands , and increasing applications of fertilizers and manures ( 4 )农牧交错带土壤瘠薄，农牧民便采取开垦土壤肥力高的土地、沤肥或烧荒、倒沙种田、增旋肥料等措施提高耕地的肥力。
4.
Article 28 for cases of opening kilns , burning wasteland for growing crops , lay anchor , drag anchor , fishing by using explosives or dig sand in the legally demarcated power facility protection zone thus endangering the safety of power facilities in violation of the provisions of this set of regulations , the power administrative departments shall order the violators to stop operation , restore to the original and compensate for the losses 第二十八条违反本条例规定，在依法划定的电力设施保护区内进行烧窑、烧荒、抛锚、拖锚、炸鱼、挖沙作业，危及电力设施安全的，由电力管理部门责令停止作业，恢复原状并赔偿损失。
