Asked by Anna
which human agricultural practices leads to the breaking down of chemicals and nitrous oxide production? raising cattle on natural grasslands, use of synthetic fertilizers use of community landfills, cutting down trees to plant crops
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Use of synthetic fertilizers.
Why: synthetic nitrogen fertilizers add large amounts of reactive N (NH4+, NO3-) to soils. Soil microbes carry out nitrification and denitrification of that added nitrogen, and those microbial processes emit nitrous oxide (N2O). (Manure and some waste-management processes can also produce N2O, but the single biggest agricultural source is synthetic N fertilizer.)
Other choices: raising cattle mainly produces methane (CH4); landfills produce CH4 (and some N2O); cutting trees to plant crops releases CO2 from biomass and soil carbon.
Why: synthetic nitrogen fertilizers add large amounts of reactive N (NH4+, NO3-) to soils. Soil microbes carry out nitrification and denitrification of that added nitrogen, and those microbial processes emit nitrous oxide (N2O). (Manure and some waste-management processes can also produce N2O, but the single biggest agricultural source is synthetic N fertilizer.)
Other choices: raising cattle mainly produces methane (CH4); landfills produce CH4 (and some N2O); cutting trees to plant crops releases CO2 from biomass and soil carbon.
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