Via Maha El Dahan, Yousef Saba and Alexander Cornwell in reuters.com: OPEC is optimistic on demand and sees under-investment as a risk to energy security, Secretary General Haitham Al Ghais said on Monday at an energy industry event in Abu Dhabi. He stressed the importance of continued investment in the oil and gas industry and said he sees calls to stop investing in oil as counterproductive. We still see oil demand as quite resilient this year, as it was last year, Al Ghais said, noting the groups forecast was for year-on-year demand growth of more than 2.3 million barrels per day (bpd).