Energy TransitionExxonMobil chief: People underestimate challenge of moving away from fossil fuelsExxonMobil, Saudi Aramco and CNPC believe energy demand will continue to growAssessment: ExxonMobil chief executive Darren Woods takes part in a panel discussion at the 24th World Petroleum Congress in Calgary, CanadaPhoto: AP/SCANPIXFabio PalmigianiCalgary