Biogas is mostly produced in landfills
A) by the anaerobic decomposition of organic materials.
B) by the release of compressed gases from aerosol containers.
C) by the evaporation of the liquids draining from the buried waste.
D) when solid materials melt into fluids and evaporate.
A
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In a battery, the following oxidation-reduction reaction is taking place: Mn2O3 + ZnO ? 2 MnO2 + Zn What is undergoing reduction as written?
A. ZnO B. Zn C. MnO2 D. Mn2O3 E. none of the above
What best explains the differences in the density gradients between 1930 and 1990 in Figure 13.9.2?
A) Suburbs grew rapidly in the second half of the 20th century along with construction of apartments and town-house projects in the periphery of the CBD. B) More jobs were created in the CBD and hence more people chose to live in the CBD by 1990. C) The outermost gradients reduced in density by 1990 because of encroaching agriculture. D) Improvements in mass transportation allowed people to move from the suburbs towards the CBDs between 1950 and 1990. E) Cities implemented restrictions on cars in the CBD and adjacent gradients starting in 1950. This resulted in a higher density living in the CBD by 1990.
The iconic Opera House is located in
a. Sydney, Australia. b. Melbourne, Australia. c. Brisbane, Australia. d. Perth, Australia. e. Adelaide, Australia.
Explain the processes currently responsible for worldwide sea level rise. How will these changes in sea level affect coastal nations?
What will be an ideal response?