What is Adblue diesel exhaust fluid?

Adblue is an additive used in many newer diesel cars and has lately made news for being in short supply. So what is it and what does it do?

AdBlue Diesel Exhaust Fluid

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Diesel Exhaust Fluid DEF 1 Gallon (AdBlue) DEF003

AD Blue Diesel Emissions Fluid for SCR Code Two 1/2 gallons (2010-2013) : Automotive

Tata Adblue Diesel Exhaust Fluid, Packaging Size: 20 Liter Pail, Model Name/Number: TLLDEF20 at Rs 55/litre in Chennai

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Adblue Diesel Exhaust Fluids (DEF) for SCR - China DEF, Adblue

Pro-99 Adblue Diesel Exhaust Fluid 10 Liters (10L) PDEF-10

Novax Adblue DEF DIESEL EXHAUST FLUID (20 Liters)

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