Ntuj Hloov Tej huab cua tsis zoo nyob saum nruab ntug yog dab tsi ? Thiab ua mob rau peb lub cev tau li cas? Tej huab cua tsis zoo nyob saum nruab ntug yog dab tsi ? Thiab ua mob rau peb lub cev tau li cas ? (What is air pollution and how does it lead to disease in our bodies?)
Heidi Kuhn coj cov lus ntawm kev thaj yeeb nyob Mias Mas mus rau cov tub ntxhais hluas lag ntseg nyob Mumbai
