The authors of the study in Health Affairs conclude that existing sales taxes may be "too low to cause changes in calorie consumption" affecting the average body mass index, or BMI.
As I was saying: There is concern that consumption of Internet media is affecting our concentration, our sleep and attention, even the very shape of our brains.
The researchers revealed that by analysing and tweaking the design of Wikipedia, energy consumption could be reduced by 30% - without affecting the user experience.