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nounChemistry.
a compound in which oxygen is bonded to one or more electropositive atoms.
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Nitrogen oxide gases produced by traffic are a powerful precursor to cities’ elevated ozone levels, which can damage the lungs and trigger respiratory ailments.
D’Arcy notes that one group has combined bricks with metal oxide nanoparticles to help filter pollution out of the air, and another has created bricks that can conduct electricity by incorporating electrodes made from carbon nanomaterials.
The researchers found that the peak drop occurred in April, when globally averaged CO2 emissions and nitrogen oxides fell by roughly 30 percent from baseline, mostly due to reduced driving.