Kalimantan was the world lungs???

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People say, Kalimantan or Borneo was the word lungs. The forest still luxuriant. But why still many people that did not realise with the function of the forest? Now already was felt by global warming. Still had the person who cut down the forest.How made them aware? I was sad... how our fate the future? how fate the word? Maybe all friend in the words could give tips and shared the experience with me. What must we done???