Discussion:
To understand the future of hydroelectricity around the world, below shows the average annual output of hydroelectricity over the past few years in various regions of the world, together with the estimated output to be economically exploitable in each region.
In less than 1000 words, comment on the information in the table, and discuss the economic, environmental or other factors that might determine the future of hydroelectricity in each of these five regions.
Regional hydroelectric output and potential:
Region - Recent average annual output /TWh y-1 - Technical potential /TWh y-1
Europe: 750 2760
Asia: 980 5590
North America: 670 2420
South America: 730 2840
Africa: 97 1980