NEW DELHI, March 11: Ultra low sulphur diesel is likely to become available in the city from April 1. The new, cleaner fuel is expected to improve the air quality in the city.

Hart Energy Publishing's International Fuel Quality Center recently released a ranking of the top 100 countries based on sulfur limits on on-road diesel. Sweden was found to be at the top of the ranking, followed by Germany and Japan, being sole position-holders of second and third place, respectively.

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