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  2. Human impact on the nitrogen cycle - Wikipedia

    en.wikipedia.org/wiki/Human_impact_on_the...

    Human impact on the nitrogen cycle is diverse. Agricultural and industrial nitrogen (N) inputs to the environment currently exceed inputs from natural N fixation . [ 1 ] As a consequence of anthropogenic inputs, the global nitrogen cycle (Fig. 1) has been significantly altered over the past century.

  3. Human impact on marine life - Wikipedia

    en.wikipedia.org/wiki/Human_impact_on_marine_life

    The diagram on the right shows some human impacts on the marine nitrogen cycle. Bioavailable nitrogen (Nb) is introduced into marine ecosystems by runoff or atmospheric deposition, causing eutrophication , the formation of dead zones and the expansion of the oxygen minimum zones (OMZs).

  4. Nitrogen cycle - Wikipedia

    en.wikipedia.org/wiki/Nitrogen_cycle

    Human activities such as fossil fuel combustion, use of artificial nitrogen fertilizers, and release of nitrogen in wastewater have dramatically altered the global nitrogen cycle. [17] [18] [19] Human modification of the global nitrogen cycle can negatively affect the natural environment system and also human health. [20] [21]

  5. Nitrogen and Non-Protein Nitrogen's effects on Agriculture

    en.wikipedia.org/wiki/Nitrogen_and_Non-Protein...

    Even though nitrogen is a necessary element for life, too much of it in water can have negative effects on aquatic ecosystems and endanger human health. Agricultural runoff, where fertilizers containing nitrogen compounds can seep into rivers, lakes, and groundwater, is one of the main sources of nitrogen in water.

  6. Agricultural pollution - Wikipedia

    en.wikipedia.org/wiki/Agricultural_pollution

    Nitrogen fixation, which converts atmospheric nitrogen (N 2) to ammonia, and denitrification, which converts biologically available nitrogen compounds to N 2 and N 2 O, are two of the most important metabolic processes involved in the nitrogen cycle because they are the largest inputs and outputs of nitrogen to ecosystems. They allow nitrogen ...

  7. Marine biogeochemical cycles - Wikipedia

    en.wikipedia.org/wiki/Marine_biogeochemical_cycles

    Nitrogen enters the ocean through precipitation, runoff, or as N 2 from the atmosphere. Nitrogen cannot be utilized by phytoplankton as N 2 so it must undergo nitrogen fixation which is performed predominantly by cyanobacteria. [82] Without supplies of fixed nitrogen entering the marine cycle, the fixed nitrogen would be used up in about 2000 ...

  8. Today's Wordle Hint, Answer for #1249 on Tuesday, November 19 ...

    www.aol.com/todays-wordle-hint-answer-1249...

    If you’re stuck on today’s Wordle answer, we’re here to help—but beware of spoilers for Wordle 1249 ahead. Let's start with a few hints.

  9. Anthropogenic metabolism - Wikipedia

    en.wikipedia.org/wiki/Anthropogenic_metabolism

    The negative effects of anthropogenic metabolism are seen through the water footprint, ecological footprint, carbon cycle, and the nitrogen cycle. Studies on the marine ecosystem that show major impacts by humans and developed countries which include more industries, thus more anthropogenic metabolism.