1) The power source with the most stable U.S. consumption pattern since 1970 is ________. Short Description: A pie chart shows proportions by source of the total United States energy consumption and a line graph shows United States energy consumption from 19 50 through 2015 by source. Long Description: U S. energy consumption, by source. Oil, 35.4%. natural gas, 27.9%. Coal, 18.3%. Nuclear, 8.5%. Bioenergy, 4.9%. Hydropower, 2.5%. New renewables, 2.4%. U S energy consumption from 19 50 to 2015, in quadrillion B T U, as follows. - Oil starts in 19 50 at 14, then climbs until reaching approximately 38 quadrillion in 19 78, fluctuating up and down to finish at 34 quadrillion in 2015. - Natural gas starts in 19 50 at 8 quadrillion B T U, and grows in similar fashion to oil to a peak around 23 in 19 70 followed by a decline in the mid nineteen eighties. The curve then climbs until reaching approximately 28 quadrillion in 20 15. - Coal starts at about 12 quadrillion and wavers on an annual basis within a dip to just under 10 quadrillion B T U in the 19 60s. It then gradually increases until a peak