What was the rate of forest coverage forty years ago?
四十年前的森林覆盖率是多少？
The disafforestation and growth of economic crops caused the decreased forest coverage rate and water and soil loss.
大量砍伐森林，种植林业经济作物使得当地森林覆盖率日渐减少，水土流失严重。
To the contrary, the rate of forest coverage reduced, the eco-environment quality correspondingly deteriorated.
而森林覆盖率下降，生态环境质量也相应下降。
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