# is nitrogen gas a compound

All about NOx, NO and NO2 » A blog introducing the nitrogen oxide family: NOx, NO and NO2. We explain the differences and whether you should be concerned about them as air pollutants. Aeroqual.com

3.2 Determining Empirical and Molecular Formulas - Chemistry 2e | OpenStax » The elemental makeup of a compound defines its chemical identity, and chemical formulas are the most succinct way of representing this elemental makeup…. Openstax.org

The nitrogen cycle (article) | Ecology | Khan Academy » Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere. Khanacademy.org

Basic Information about NO2 | US EPA » Nitrogen Dioxide (NO2) and other nitrogen oxides (NOx) damage the human respiratory system and contribute to acid rain. These air pollutants are regulated as part of EPA's National Ambient Air Quality Standards (NAAQS). Epa.gov

Methane and NOx Emissions from Natural Gas Stoves, Cooktops, and Ovens in Residential Homes » Natural gas stoves in >40 million U.S. residences release methane (CH4)─a potent greenhouse gas─through post-meter leaks and incomplete combustion. We quantified methane released in 53 homes during all phases of stove use: steady-state-off (appliance not in use), steady-state-on (during combustion), and transitory periods of ignition and extinguishment. We estimated that natural gas stoves emit 0.8–1.3% of the gas they use as unburned methane and that total U.S. stove emissions are 28.1 [95% confidence interval: 18.5, 41.2] Gg CH4 year–1. More than three-quarters of methane emissions we measured originated during steady-state-off. Using a 20-year timeframe for methane, annual methane emissions from all gas stoves in U.S. homes have a climate impact comparable to the annual carbon dioxide emissions of 500 000 cars. In addition to methane emissions, co-emitted health-damaging air pollutants such as nitrogen oxides (NOx) are released into home air and can trigger respiratory diseases. In 32 homes, we m Pubs.acs.org