短文填空China's efforts to fight desertification in its northern area {#blank#}1{#/blank#}(achieve) remarkable progress over the past 45 years. So far, the Three-North Shelter Forest Program {#blank#}2{#/blank#}(launch) in 1978 has planted and conserved 32 million hectares (公顷) of forests and restored 85 million hectares of degraded grassland, and the forest {#blank#}3{#/blank#}(cover) in the project area has increased from 5.05 percent in 1978 to 13.84 percent today.
The project has set up a green Great Wall to act as a safeguard {#blank#}4{#/blank#} sandstorms, conserves oil and water and promote agricultural development in the northern border of China. Though extra ordinary achievements are made in the program, the work {#blank#}5{#/blank#}(say) to be still challenging due to the wide distribution and severe conditions of desert land. The environmental delicacy of the region and continuous environmental issues make the task even {#blank#}6{#/blank#}(hard).
Recognizing the importance of desert ecosystems in regulating climate and keeping {#blank#}7{#/blank#} balanced environment, the authorities shifted from a traditional approach to working in harmony with it, {#blank#}8{#/blank#}(allow) for sustainable development and coexistence. Bringing nature to {#blank#}9{#/blank#}(it) original condition should not rely on human efforts in the long term. The scientific and holistic(全面的) approach to conserving mountains, rivers, forests and farmland is crucial, {#blank#}10{#/blank#} the ecologists believe can help nature restore itself.
