BP's annual energy forecast. This is the first year they've stretched the timeline--from 2030 to 2035. According to BP forecasters, global energy demand will rise 41% from now until 2035 with 95% of that growth coming from "emerging economies." Also, gas as a source of energy is growing fastest for fossil fuels and by 2035 is expected to be at parity with coal--each providing about 27% of power needs in 2035. BP says shale gas will make up 68% of U.S. gas production by 2035.