The weather is hot as Bambang Hero Saharjo collects soil samples and debris in a burned-out forest in Riau, Sumatra, clues that could point to the perpetrators of the massive fires which sent choking fumes to large parts of Indonesia and the region this year.
'Earth provides enough to satisfy every man's need but not every man's greed,' Indian revolutionary leader Mahatma Gandhi once said.
As Mr Bambang, a fire investigator, hunts for evidence to bring the arsonists to justice, he's reminded of that greed. The scorched earth stretches for kilometres, testimony to the horrific destruction of thousands of hectares of forest and peat land in Sumatra and Kalimantan, much of it by corporations.
Millions of people in the region have been forced to endure choking, poisonous fumes that damage their lungs and sting their eyes for months on end in every dry season.
The fires this year were the worst since the haze that blanketed much of Southeast Asia in 1997 and 1998. Environment ministers from nations in the area have met repeatedly to try to deal with the problem and Indonesian President Susilo Bambang Yudhoyono even made a public apology at the height of the fires this year when Singapore and the Malaysian capital, Kuala Lumpur, were affected.
But determined to maximise profits, unscrupulous corporations, including Malaysian and Singaporean firms, continue to use fire to clear land for oil palm and timber plantations because it costs a fraction of using machinery.
'It costs two to three million rupiah [HK$1,715-HK$2,570] per hectare to clear the land through burning. If machinery is used, it will cost 20-30 million per hectare,' Mr Bambang said.