The rate of failure in reforestation and afforestation projects is phenomenal," he says, citing how vulnerable saplings are to the elements when they are very small (in one study, 83% of replanted trees died within 10 years). "Only a really small proportion make it to the final grade."

อ่านต่อได้ที่   โรงเรียนบ้านหนองแร้ง
สาระน่ารู้  ชีวิต