Cây cối là những yếu tố quan trọng trong việc ngăn ngừa hạn hán và lũ lụt, vì vậy cần thiết phải thiết lập 1 hệ thống kiểm soát để ngăn chặn cây bị đốn bừa bãi với số lượng lớn.
Trees are important factors in preventing drought and floods, so it is necessary to establish a control system to prevent trees from being cut down in large numbers.
Trees are a key factor in preventing drought and floods, so it is necessary to establish control systems to prevent them from being extensively cut down.
Trees are an important factor to prevent drought and flood, so it is necessary to establish a control system to prevent a large number of trees from being cut down.