highlights world energy consumption is projected to increase by 57 percent from 2002 2025 much of the growth in worldwide use ieo2005 reference case forecast expected countries with emerging economies international outlook 2005 refer ence marketed pro jected on average 2 0 per year over 23 horizon slightly lower than annual rate 1970 total grow 412 quadrillion british thermal units btu 553 2015 and 645 qua drillion figure 1 account for next two decades group more doubling strong economic drives demand region eco nomic activity as measured gross domestic product gdp purchasing power parity terms expand 5 econo mies compared
