With reference to sources of energy the term 2nd generation biofuel usually refers to the biof...........

Environment and Ecology Air Pollution

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With reference to sources of energy, the term 2nd generation biofuel usually refers to the biofuels

which are made from non food feedstocks.

which are made from feedstocks used for human consumption.

where algae is used as primary energy source for its production.

which are designed to capture large amounts of carbon, with genetically synthesized microbes.

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Explanation:

? The option 1 is correct while options (2), (3), (4) are not correct.

? option (a): 2nd generation biofuel where usually non food feedstocks such as woody crops or agricultural residues or waste are used which are a little more diffuclt to extract and mostly unfit for human consumption.

? option (b) : It is basically referred to as 1st generation biofuel. The feedstocks that are typically used are corn, sugarcane, wheat ,sorghum etc . Since they are easily extracted, they are also known as 'conventional biofuels'.

? option (c) : It is referred to as 3rd generation biofuels which usually uses algae becuase it is capable of producing much more than its other feedstock counterparts .

? option ( d): It is a 4th generation biofuel which is in most advanced stage of production.