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Posted Mon Dec 27 2010: from National Science Foundation via ScienceDaily:
Global Rivers Emit Three Times IPCC Estimates of Greenhouse Gas Nitrous Oxide
...Human-caused nitrogen loading to river networks is a potentially important source of nitrous oxide emission to the atmosphere. Nitrous oxide is a potent greenhouse gas that contributes to climate change and stratospheric ozone destruction. It happens via a microbial process called denitrification, which converts nitrogen to nitrous oxide and an inert gas called dinitrogen. When summed across the globe, scientists report this week in the journal Proceedings of the National Academy of Sciences (PNAS), river and stream networks are the source of at least 10 percent of human-caused nitrous oxide emissions to the atmosphere. That's three times the amount estimated by the Intergovernmental Panel on Climate Change (IPCC).
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'Doc Michael says:
I thought denitrification was when I got my teeth fixed up.

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