Humans Have Dramatically Altered the Rate of Nitrogen Fixation into Forms

question 10

Multiple Choice

Humans have dramatically altered the rate of nitrogen fixation into forms usable by autotrophs by _____________.

• A)selectively removing leguminous plants
• B)using antibiotics to reduce the numbers of denitrifying bacteria
• C)burning of fossil fuels to meet our energy needs
• D)increasing the erosion of farmlands through poor agricultural practices
• E)producing synthetic fertilizers and applying them to crops,lawns,and parks

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