December 2010

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Use more natural gas to reduce GHG emission

Indonesia has abundance natural gas reserves, but less in consumption. According to a recent World Bank study, a greater use of natural gas can help the Indonesian government reach its target of reducing greenhouse gas…


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A brief note on biodiesel: cost of production

Global demand on biofuel is predicted higher in coming years. Many countries had developed policy to increase their utilization on biofuel, including biodiesel too. This demand growth has been examined by scientists recently in relating…



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Economic potential of second-generation biofuels

Oil palm plantation is the most productive crops for biofuel materials. However this productivity must be tradded off with environmental impacts such biodiversity losses –if the plantations established from forests clearing. Palm oil also becomes…


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Global warming effects on forest fire, coral reefs

Public are open on the discussion of global warming effects, although some skeptics tend to questioning on the validation of climate researches.  Ring a bell about Climategate months ago?  The skeptics boosted the issue a…


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Goal Seek in What-If Analysis

One of my favorite tips in Microsoft Excel 2007 is goal seek. The command can be found under What-If Analysis menu in data tools of  Data tab. Generally, what-if analysis provide us several different sets…