How to practice concept:energy

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Question 65

Open question
ESNAT2 marksNeeds review
An agricultural land can support energy crops yield to produce 7000 L of bioethanol per hectare and energy content of bioethanol is 21 MJ/L. This bioethanol displaces fossil-based petrol.
The CO

offset potential of land used for growing energy crops as a bioethanol feedstock is _____

g of CO

/hectare (rounded off to one decimal place).
Consider CO

footprints of 10 g and 80 g of CO

per MJ for bioethanol and petrol, respectively.

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