Which of the following would inhibit the production of biogas in a fermentation chamber commonly used by small farmers?
A) Double the overall size of the fermentation chamber
B) Add equal parts of manure and water into the chamber and reseal the top
C) Leave the lid off of the top of the fermentation chamber
D) Collect biogas from an enclosed fermentation chamber
Question 2
The eruption of Mt. Pinatubo in the Philippines
A) affected only local, island ecosystems.
B) produced large amounts of sulfur dioxide but few aerosols.
C) produced aerosols that blocked the sun and resulted in a drop in global temperatures.
D) caught the human populations unaware, giving no prior signs of activity.
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Conventional oil reserves have passed peak production