Bloomberg: Fatih Birol, the International Energy Agency’s chief economist, called on leaders of the Group of 20 Nations to fulfill their pledge to end fossil-fuel subsidies, a move he said will cut oil demand and greenhouse-gas emissions. Stopping aid by 2020 would reduce global oil demand by 6.5 million barrels a day, he said, or about a third of the current U.S. use. Subsidies that promote consumption, such as below- market gasoline prices, totaled $557 billion in 2008, he said. Nations that …