ການ​ເຕືອນ ຕໍ່​ການ​ນຳ​ໃຊ້​ຫິ​ມະ​ທຽມ ມີ​ຂຶ້ນ​ຂະ​ນະ​ທີ່​ກິ​ລາ​ໂອ​ລິມ​ປິກປັກ​ກິ່ງ ຖືກ​ຂົ່ມ​ຂູ່ ຍ້ອນ​ການ​ປ່ຽນ​ແປງ​ຂອງ​ອາ​ກາດ

As Beijing prepares for the opening of the Winter Olympics this week, scientists are warning that the future of the games is under threat – because of climate change. Henry Ridgwell reports. Producer: Marcus Harton