In line with longstanding initiatives to expand its green spaces, New York City is planting tens of thousands of trees each year. They provide shade, lower surface temperatures by releasing moisture, absorb a surprising amount ...
Earth Sciences
Aug 5, 2024
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Atmospheric nitrogen dioxide is a harmful pollutant with significant impacts on air quality, climate and the biosphere. Although satellites have mapped nitrogen dioxide concentrations since the 1990s, their resolution was ...
Earth Sciences
Aug 5, 2024
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139
Experiments published in Food and Energy Security by scientists at Queen Mary University of London and Royal Botanic Gardens suggest that we are globally wasting huge amounts of phosphorus.
Plants & Animals
Aug 5, 2024
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A recent Supreme Court decision to block a federal rule curbing interstate air pollution further complicates efforts to reduce emissions and adds to an already disproportionate burden on "downwind" states, according to researchers ...
Environment
Jul 31, 2024
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For the first time, NASA data about nitrogen dioxide (NO2), a harmful air pollutant, is available on the Environmental Protection Agency's (EPA) widely used Environmental Justice Screening and Mapping Tool (EJScreen). This ...
Environment
12 hours ago
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Nitrogen (pronounced /ˈnaɪtrədʒɨn/) is a chemical element that has the symbol N and atomic number 7 and atomic mass 14.00674 u. Elemental nitrogen is a colorless, odorless, tasteless and mostly inert diatomic gas at standard conditions, constituting 78% by volume of Earth's atmosphere.
Many industrially important compounds, such as ammonia, nitric acid, organic nitrates (propellants and explosives), and cyanides, contain nitrogen. The extremely strong bond in elemental nitrogen dominates nitrogen chemistry, causing difficulty for both organisms and industry in converting the N2 into useful compounds, and releasing large amounts of energy when these compounds burn or decay back into nitrogen gas.
The element nitrogen was discovered by Daniel Rutherford, a Scottish physician, in 1772. Nitrogen occurs in all living organisms. It is a constituent element of amino acids and thus of proteins, and of nucleic acids (DNA and RNA). It resides in the chemical structure of almost all neurotransmitters, and is a defining component of alkaloids, biological molecules produced by many organisms.
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