Other than the rock itself, the most important chemical substance needed for the majority of chemical weathering processes is
A) water.
B) argon.
C) nitrogen.
D) carbon dioxide.
E) oxygen.
A
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Sandstone-carbonate-shale assemblages were deposited along _______ continental margins during the Proterozoic
Fill in the blank(s) with correct word
According to the graph, what year was the Montreal Protocol most likely to have been enacted?
A) 2000 B) 1990 C) 1984 D) 1982 E) 1987
Petroleum, natural gas and propane are all considered ________ because they formed from the buried remains of plants and animals that lived millions of years ago.
A. renewable fuels B. gaseous fuels C. oil fuels D. fossil fuels E. nonmetallic fuels
The objective of imposing a higher pollution tax is to
A. ensure firms have pollution charge credits for all reduced emissions. B. provide incentive for firms to maintain regulation emission levels. C. provide adequate incentive for firms to reduce their emissions by more. D. ensure firms must pay the pollution charge for all reduced emissions.