The pie charts illustrate informations about the changes in the providement sources of electricity in New Zealand and Germany.
Overall, there was an increase sharply about total electricity consumption from 1980 to 2010. In addtion, the trend using coal at New Zealand and nuclear at Germany in 1980 and 2010.
In New Zealand, it is noticeable that the amount of coat source grew significantly from 56 units to 150 units over the period of time. At the same time, hydro source even showed an slight upward trend from 30 units to 46 units. In contrast, petroleum and natural gas were equally important to the electricity sources in 1980. They made up 60 units of total figure, but they deacreased drastically at 2 units each source in 2010.
On the other hand, nuclear energy provided a vast majority for 155 units in Germany in2010, while this figure was just 20 units in 1980. There was a tiny grew of petroleum by 5 units over the period of time. Coal energy over 50 years still remained. Other sources were no longer significant