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While diesel fuel contains slightly more carbon (2.68 kg CO 2 /litre) than petrol (2.31 kg CO 2 /litre), overall, the CO 2 emissions of a diesel car tend to be lower due to higher efficiency. In use, on average, this equates to around 200 g CO 2 /km for petrol and 120 g CO 2 /km for diesel.
Diesel exhaust fluid (DEF; also known as AUS 32 and sometimes marketed as AdBlue [3]) is a liquid used to reduce the amount of air pollution created by a diesel engine. Specifically, DEF is an aqueous urea solution made with 32.5% urea and 67.5% deionized water .
Diesel fuel has many colloquial names; most commonly, it is simply referred to as diesel.In the United Kingdom, diesel fuel for road use is commonly called diesel or sometimes white diesel if required to differentiate it from a reduced-tax agricultural-only product containing an identifying coloured dye known as red diesel.
It is dependent on several factors including engine efficiency, transmission design, and tire design. In most countries, using the metric system, fuel economy is stated as "fuel consumption" in liters per 100 kilometers (L/100 km) or kilometers per liter (km/L or kmpl).
HBEFA computes the selected emission factors either as weighted emission factors per vehicle category, per emission stage (e.g. EURO-5-passenger cars, etc.), per fuel type (gasoline, diesel, alternatives) or per sub-segment (= vehicle category/size class/emission stage, such as passenger cars with engine size <1.4 l EURO-3, etc.) and per traffic situation.
On 19 June 2000, under Report of the Subcommittee on resolution under section 4(2) of the Dutiable Commodities Ordinance (Cap. 109), ULSD fuel tax was lowered to HK$1.11 per litre between 7 July 2000 and 31 December 2000, then increased to $2 in 2001, then $2.89 per litre on 1 January 2002. This resolution was passed on 27 June 2000.
Air pollution emission factors are usually expressed as the weight of the pollutant divided by a unit weight, volume, distance, or duration of the activity emitting the pollutant (e.g., kilograms of particulate matter emitted per megagram of coal burned). The factors help to estimate emissions from various sources of air pollution.
The EN 590 had been introduced along with the European emission standards.With each of its revisions the EN 590 had been adapted to lower the sulphur content of diesel fuel – since 2007 this is called ultra-low-sulphur diesel as the former function of sulphur as a lubricant is absent (and needs to be replaced by additives).
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