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Card 16
Front
Describe how biogas production is affected by temperature.
Back
Card 17
Front
If biogas contains more than 50% methane, what can we do?
Back
Card 18
Front
If biogas contains less than 10% methane, what can happen?
Back
Card 19
Front
What is biogas a 'cleaner' fuel than? Why? What is the disadvantage of biogas?
Back
Card 20
Front
What are the two different methods of transferring energy from biomass?
Back
Card 21
Front
Give three advantage of using biofuels.
Back
Card 22
Front
Under what circumstances does the burning of biofuels does not cause a net increase in greenhouse gas levels?
Back
Card 23
Front
In some areas, what is the use of large areas of land to produce biofuels resulting in? (2)
Back
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