Pontianak, Indonesia – Toiling around the clock, haggard Indonesian firefighters on Borneo island cannot keep up with the blazes devouring landscapes and shrouding communities in a cloying haze. They are fighting a perilous battle with limited weapons against fires blamed in part on a stronger-than-usual episode of the El Nino climate phenomenon parching Southeast Asia. Experts also blame climate change, decades of forest degradation and slash-and-burn land clearing practices that have changed the naturally fire-resistant landscape. “We are exhausted. Sometimes we carry out firefighting until dawn. Sometimes we don’t sleep,” said Sampe Ritonga, fire chief for Sintang regency. …Some 400 kilometres (250 miles) away in Pontianak — the capital of West Kalimantan province — people have been breathing foul air for weeks. …on Sunday, the level of PM2.5 pollution exceeded 500 micrograms per cubic metre, according to IQAir, a Switzerland-based monitor. That is more than 100 times the World Health Organization’s recommended safe limit