DIỆN TÍCH RỪNG Ở NƯỚC TA, GIAI ĐOẠN 1943 - 2018 (Đơn vị: Triệu ha) Năm:1943/1993/2018 Diện tích rừng:14,3/8,6/14,5 a) Tính tỉ lệ (%) che phủ rừng so với diện tích đất liền (diện tích đất liền của nước ta làm tròn là 33 triệu ha). b) Vẽ biểu đồ thể hiện tỉ lệ che phủ rừng năm 1993 và năm 2018. Rút ra nhận xét cần thiết? giúp mình

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