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Mot trong nhung loai than khong khoi duoc ua chuong nhat hien nay la than gao dua. Loai than nay duoc san xuat tu gao dua gia tu nhien, giup tan dung nguon nguyen lieu co san ma khong can khai thac rung, tu do gop phan bao ve tai nguyen thien nhien va giam thieu nan pha rung.