Mea­sur­ing the re­bound ef­fect

Down to Earth - - SCIENCE -

W E M AY be los­ing en­ergy-sav­ing ben­e­fits of fuel-ef­fi­cient cars be­cause we are driv­ing more. Im­prove­ments in fuel ef­fi­ciency should lead to re­duc­tions in fuel con­sump­tion. But since im­proved fuel ef­fi­ciency makes driv­ing cheaper, some of the po­ten­tial fuel sav­ings are taken back through in­creased driv­ing. This is called the re­bound ef­fect. Us­ing data from 1970 to 2011, en­ergy ex­perts found a long-term re­bound ef­fect among Bri­tish car driv­ers of around 20 per cent. En­ergy Eco­nom­ics, Fe­bru­ary

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