Fires in Southeast Asia may be emitting more greenhouse gases than the entire U.S.

Fires burn at a concession area in Pelalawan, Indonesia. (Adek Berry / AFP/ Getty Images)

A toxic haze has repeatedly wafted over huge swaths of Southeast Asia in the last month, causing school closures, grounded flights, canceled events and widespread concern about public health risks across the region. Here’s what you need to know about the Great Haze of 2015.

Nearly 100,000 fires are burning, setting up what looks to be the worst fire year in the region since 2006. The carbon emissions from the blazes have now surpassed those of the entire United States — the world’s second-largest emitter of greenhouse gases — on 26 out of 44 days since September, according to a report by the World Resources Institute. READ MORE ......

A resident fishes by the river in Palangkaraya, one of the cities worst-hit by haze in Indonesia's central Kalimantan province.

 (Haris Sadikin / AFP/ Getty Images)