Which of the following have contributed most to the increase in atmospheric carbon dioxide levels over the past 250 years?
A) Deforestation and combustion of fossil fuels
B) Volcanic eruptions and widespread forest fires
C) The thawing of permafrost and habitat alteration for agriculture
D) Deforestation and ocean acidification
A
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What is kerogen?
A. The active ingredient in kerosene B. A waste product from the production of oil from oil shale C. A fuel supplement added to diesel oil D. The useful ingredient in oil shale E. Sludge from sewage plants
Which word best describes volcanic rock?
A) cemented B) transparent C) intergrown D) fragmented
________ and high moisture increase the decomposition rate of organic matter.
A. High sunlight B. High parent material C. High pH D. High temperatures
The ratio of vapor pressure to saturation vapor pressure is the ____________________ ____________________
Fill in the blank(s) with correct word