Shell expects hit of up to $1bn on stalled biofuel plant Financial TimesEnergy giant Shell to take up to a $2 billion impairment hit on Rotterdam, Singapore plants CNBCShell Sees Up to $2 Billion Writedown After Biofuels Delay BloombergShell to Take Up to $2 Billion Impairment Hit, Expects Weaker Gas Trading The Wall Street JournalShell to take hit of up to $2bn on Rotterdam and Singapore sites The Guardian