A smog outbreak in Southeast Asia last year may have caused over 100,000 premature deaths, according to a new study released Monday that triggered calls for action to tackle the ?killer haze?. Researchers from Harvard and Columbia universities in the US estimated there were more than 90,000 early deaths in Indonesia in areas closest to haze-belching fires, and several thousand more in neighboring Singapore and Malaysia. I feel so sad at the thought of this haze killing thousands of people.