Science, Maths & Technology
How to compare income across countries
...students producing no rubbish for three weeks at a time then 15 sacks once a month? And how would they compare to a family of four producing 2 sacks a week? What is our basis of comparison? Rubbish per household, per person, per week, per month, per year? In the video, Professor Hans Rosling demonstrates how development in terms of average income and lifespan has changed...