Other Sources of NO
	q N2O is currently the largest source of stratospheric odd nitrogen (NO and NO2). q How human activity affect NO?        high-flying, supersonic transport airplanes        è Jet plane-produced high temperatures from combustion.        è combine N2 and O2 to form NO.        è injected NO goes to the stratosphere and destroy ozone        è This is why jet plans can affect stratospheric ozone layer              (even though jet plans fly in the upper troposphere).