Shale oil extraction Energy estimates that the "ex-situ" processing would be economic at sustained average world oil prices above $54 per barrel and "in-situ" processing would be economic at prices above $35 per barrel. These estimates assume a return rate of 15%. Royal Dutch Shell announced in 2006 that its Shell ICP technology would realize a profit when crude oil prices are higher than $30 per barrel ($190/m), while some technologies at full-scale production assert profitability at oil prices even lower than $20 per barrel ($130/m). To increase the efficiency of oil shale retorting and by this the viability of the shale oil
How Are You realizes that he has to leave, as he's "gotta thousand little things I better do. Ah, but it was really good to talk to you. Be on my way, I'm bound to see you on the street again someday, and when I do I'll say How are you?" The reuniting theme of "How Are You" is also apparent in its follow-up single, "Lost and Found". "How Are You", like most Kinks tracks, is sung by Ray Davies. The track also, like many others on "Think Visual", makes use of synthesizers. "How Are You" was first released in November 1986 on