In the United States, per capita energy use ________, and energy intensity ________. Group of answer choices increased sharply from 1950 to the 1970s but has since declined; has been declining since 1970 increased sharply from 1950 to the 1970s but has since declined; decreased from 1950 to the 1970s but has since increased has been increasing since 1950; has been declining since 1950 has been increasing since 1950; has also been increasing since 1950 was stable from 1950 to 1970 but has since increased sharply; has been increasing since 1950