The beginning of the amazing events at Krakatoa in 1883 date to May 20 when there were initial rumblings and venting from the volcano, which had been dormant for about 200 years.
A refinery margin is the revenue associated with refining petroleum, expressed as a value per volume (e.g. $/L), net of the cost of the crude oil input. The simplest refining
Photo: Reuters. Mumbai: State-owned refineries in India have seen their gross refining margins, (GRMs) a key metric of profitability, fall to a four-year low due the low prices of petrol and diesel which account for the bulk of sales for these firms.