Agricultural application of nitrogen fertilizer
A) reduces global warming by increasing the storage of carbon dioxide in plant biomass.
B) increases global warming by increasing microbial respiration in agricultural soils.
C) increases global warming by increasing the production of nitrous oxide (N2O) by denitrification in agricultural soils.
D) has little to no effect on the carbon cycle.
Greenhouse gases
A) such as CO2, CH4, and N2O trap infrared radiation and heat the Earth.
B) such as CO2 increase plant and animal growth, resulting in more heat production on Earth.
C) such as CO2 and O3 (ozone) interact with UV light and heat the Earth.
D) such as CO2, CH4, and N2O destroy O3 (ozone) and allow more UV light to enter the atmosphere, thus increasing the temperature of the Earth's surface.
The ocean has mitigated the impact of anthropogenic carbon dioxide production by
A) absorbing 500 billion tons of atmospheric carbon dioxide.
B) absorbing over 80 of the trapped heat energy.
C) storing 600 billion tons of organic carbon.
D) absorbing 500 billion tons of atmospheric carbon dioxide and over 80 of the trapped heat energy.
Mercury is NOT used in
A) electronics.
B) neurotoxins.
C) pesticides.
D) paper pulping.
Which is the MOST toxic form of mercury?
A) CH3Hg+
B) Hg0
C) Hg2+
D) Hg4+
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