Simplified Theory: Olefinic chains in contact with air undergo a slow oxidation process (becoming rancid). The primary degree of this deterioration is the formation of hydroperoxides which attach  themselves to the carbon atom adjacent to the double bond.

The progress of renewable energy (RE) power plants had been relatively slow in Malaysia compared to its neighbours. But silently some RE plants have been taking shape behind the scene and perhaps it is useful to highlight them here for the general knowledge of the industry.