Question

What I found challenging​ in coal and petroleum​

Answer 1

Answer:

In particular, grand challenges that will require our attention in the coming decades include: an increase in efficiency of the way in which energy is extracted from fossil fuels, the conservation of water in energy production, the sustainable recovery of fossil fuels, the flexibility of fuel generation.

Answer 2

In particular, grand challenges that will require our attention in the coming decades include: an increase in efficiency of the way in which energy is extracted from fossil fuels, the conservation of water in energy production, the sustainable recovery of fossil fuels, the flexibility of fuel generation.

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