Cov Khoom Uas Tsis Muaj Dej Thiab Harmless Naturally Degradable Water-soluble Yas!

300 lab tons ntawm cov yas tau tsim txhua xyoo, 50% ntawm cov uas pov tseg cov yas. Yas kuab paug muaj thoob plaws hauv hav zoov thiab dej hiav txwv. Cov khoom yas yuav tsis muaj tej yam tsis zoo rau ntau pua xyoo. Israeli chemical engineer Sharon Barak tsim cov yas ua kom dej-tawm. Nws yog tsis muaj mob thiab tuaj yeem ua rau ntuj qhuav. Vam tias cov khoom siv no ib puag ncig muaj peev xwm thov tau thaum lub sijhawm ntxov.