Financial Times | Oil is always a puzzle and can look like an annuity Financial Times Both literally and metaphorically, oil drives modern economies. It is so central to what we do that its price is the single biggest determinant of prosperity, yet despite the concerted efforts of economists everywhere, it has proved almost impossible ... Shell sells oil sands assets as boss warns on clean energy challenge Shell Sells Almost All Canadian Oil Sands Assets Shell's 'green' van Beurden warns on looming peak oil demand |